LCOV - lcov.info - /usr/include/c++/4.3/i486-linux-gnu/bits/gthr-default.h

LTP GCOV extension - code coverage report
Current view: | directory - usr/include/c++/4.3/i486-linux-gnu/bits - gthr-default.h
Test: | lcov.info
Date: | 2008-08-14 |  | Instrumented lines: | 2
Code covered: | 0.0 % |  | Executed lines: | 0

           1                 : /* Threads compatibility routines for libgcc2 and libobjc.  */
           2                 : /* Compile this one with gcc.  */
           3                 : /* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
           4                 :    Free Software Foundation, Inc.
           5                 :
           6                 : This file is part of GCC.
           7                 :
           8                 : GCC is free software; you can redistribute it and/or modify it under
           9                 : the terms of the GNU General Public License as published by the Free
          10                 : Software Foundation; either version 2, or (at your option) any later
          11                 : version.
          12                 :
          13                 : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
          14                 : WARRANTY; without even the implied warranty of MERCHANTABILITY or
          15                 : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
          16                 : for more details.
          17                 :
          18                 : You should have received a copy of the GNU General Public License
          19                 : along with GCC; see the file COPYING.  If not, write to the Free
          20                 : Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
          21                 : 02110-1301, USA.  */
          22                 :
          23                 : /* As a special exception, if you link this library with other files,
          24                 :    some of which are compiled with GCC, to produce an executable,
          25                 :    this library does not by itself cause the resulting executable
          26                 :    to be covered by the GNU General Public License.
          27                 :    This exception does not however invalidate any other reasons why
          28                 :    the executable file might be covered by the GNU General Public License.  */
          29                 :
          30                 : #ifndef _GLIBCXX_GCC_GTHR_POSIX_H
          31                 : #define _GLIBCXX_GCC_GTHR_POSIX_H
          32                 :
          33                 : /* POSIX threads specific definitions.
          34                 :    Easy, since the interface is just one-to-one mapping.  */
          35                 :
          36                 : #define __GTHREADS 1
          37                 :
          38                 : /* Some implementations of <pthread.h> require this to be defined.  */
          39                 : #if !defined(_REENTRANT) && defined(__osf__)
          40                 : #define _REENTRANT 1
          41                 : #endif
          42                 :
          43                 : #include <pthread.h>
          44                 : #include <unistd.h>
          45                 :
          46                 : typedef pthread_key_t __gthread_key_t;
          47                 : typedef pthread_once_t __gthread_once_t;
          48                 : typedef pthread_mutex_t __gthread_mutex_t;
          49                 : typedef pthread_mutex_t __gthread_recursive_mutex_t;
          50                 : typedef pthread_cond_t __gthread_cond_t;
          51                 :
          52                 : /* POSIX like conditional variables are supported.  Please look at comments
          53                 :    in gthr.h for details. */
          54                 : #define __GTHREAD_HAS_COND      1
          55                 :
          56                 : #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
          57                 : #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
          58                 : #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
          59                 : #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
          60                 : #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
          61                 : #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
          62                 : #else
          63                 : #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
          64                 : #endif
          65                 : #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
          66                 :
          67                 : #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK
          68                 : # ifndef __gthrw_pragma
          69                 : #  define __gthrw_pragma(pragma)
          70                 : # endif
          71                 : # define __gthrw2(name,name2,type) \
          72                 :   static __typeof(type) name __attribute__ ((__weakref__(#name2))); \
          73                 :   __gthrw_pragma(weak type)
          74                 : # define __gthrw_(name) __gthrw_ ## name
          75                 : #else
          76                 : # define __gthrw2(name,name2,type)
          77                 : # define __gthrw_(name) name
          78                 : #endif
          79                 :
          80                 : /* Typically, __gthrw_foo is a weak reference to symbol foo.  */
          81                 : #define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name)
          82                 :
          83                 : /* On Tru64, /usr/include/pthread.h uses #pragma extern_prefix "__" to
          84                 :    map a subset of the POSIX pthread API to mangled versions of their
          85                 :    names.  */
          86                 : #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
          87                 : #define __gthrw3(name) __gthrw2(__gthrw_ ## name, __ ## name, name)
          88                 : __gthrw3(pthread_once)
          89                 : __gthrw3(pthread_getspecific)
          90                 : __gthrw3(pthread_setspecific)
          91                 : __gthrw3(pthread_create)
          92                 : __gthrw3(pthread_cancel)
          93                 : __gthrw3(pthread_mutex_lock)
          94                 : __gthrw3(pthread_mutex_trylock)
          95                 : __gthrw3(pthread_mutex_unlock)
          96                 : __gthrw3(pthread_mutex_init)
          97                 : __gthrw3(pthread_cond_broadcast)
          98                 : __gthrw3(pthread_cond_wait)
          99                 : #else
         100                 : __gthrw(pthread_once)
         101                 : __gthrw(pthread_getspecific)
         102                 : __gthrw(pthread_setspecific)
         103                 : __gthrw(pthread_create)
         104                 : __gthrw(pthread_cancel)
         105                 : __gthrw(pthread_mutex_lock)
         106                 : __gthrw(pthread_mutex_trylock)
         107                 : __gthrw(pthread_mutex_unlock)
         108                 : __gthrw(pthread_mutex_init)
         109                 : __gthrw(pthread_cond_broadcast)
         110                 : __gthrw(pthread_cond_wait)
         111                 : #endif
         112                 :
         113                 : __gthrw(pthread_key_create)
         114                 : __gthrw(pthread_key_delete)
         115                 : __gthrw(pthread_mutexattr_init)
         116                 : __gthrw(pthread_mutexattr_settype)
         117                 : __gthrw(pthread_mutexattr_destroy)
         118                 :
         119                 :
         120                 : #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
         121                 : /* Objective-C.  */
         122                 : #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
         123                 : __gthrw3(pthread_cond_destroy)
         124                 : __gthrw3(pthread_cond_init)
         125                 : __gthrw3(pthread_cond_signal)
         126                 : __gthrw3(pthread_exit)
         127                 : __gthrw3(pthread_mutex_destroy)
         128                 : __gthrw3(pthread_self)
         129                 : #else
         130                 : __gthrw(pthread_cond_destroy)
         131                 : __gthrw(pthread_cond_init)
         132                 : __gthrw(pthread_cond_signal)
         133                 : __gthrw(pthread_exit)
         134                 : __gthrw(pthread_mutex_destroy)
         135                 : __gthrw(pthread_self)
         136                 : #endif /* __osf__ && _PTHREAD_USE_MANGLED_NAMES_ */
         137                 : #ifdef _POSIX_PRIORITY_SCHEDULING
         138                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
         139                 : __gthrw(sched_get_priority_max)
         140                 : __gthrw(sched_get_priority_min)
         141                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
         142                 : #endif /* _POSIX_PRIORITY_SCHEDULING */
         143                 : __gthrw(sched_yield)
         144                 : __gthrw(pthread_attr_destroy)
         145                 : __gthrw(pthread_attr_init)
         146                 : __gthrw(pthread_attr_setdetachstate)
         147                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
         148                 : __gthrw(pthread_getschedparam)
         149                 : __gthrw(pthread_setschedparam)
         150                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
         151                 : #endif /* _LIBOBJC || _LIBOBJC_WEAK */
         152                 :
         153                 : #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK
         154                 :
         155                 : /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
         156                 :    -pthreads is not specified.  The functions are dummies and most return an
         157                 :    error value.  However pthread_once returns 0 without invoking the routine
         158                 :    it is passed so we cannot pretend that the interface is active if -pthreads
         159                 :    is not specified.  On Solaris 2.5.1, the interface is not exposed at all so
         160                 :    we need to play the usual game with weak symbols.  On Solaris 10 and up, a
         161                 :    working interface is always exposed.  On FreeBSD 6 and later, libc also
         162                 :    exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up
         163                 :    to 9 does.  FreeBSD >= 700014 even provides a pthread_cancel stub in libc,
         164                 :    which means the alternate __gthread_active_p below cannot be used there.  */
         165                 :
         166                 : #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__))
         167                 :
         168                 : static volatile int __gthread_active = -1;
         169                 :
         170                 : static void
         171                 : __gthread_trigger (void)
         172                 : {
         173                 :   __gthread_active = 1;
         174                 : }
         175                 :
         176                 : static inline int
         177                 : __gthread_active_p (void)
         178                 : {
         179                 :   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
         180                 :   static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;
         181                 :
         182                 :   /* Avoid reading __gthread_active twice on the main code path.  */
         183                 :   int __gthread_active_latest_value = __gthread_active;
         184                 :
         185                 :   /* This test is not protected to avoid taking a lock on the main code
         186                 :      path so every update of __gthread_active in a threaded program must
         187                 :      be atomic with regard to the result of the test.  */
         188                 :   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
         189                 :     {
         190                 :       if (__gthrw_(pthread_once))
         191                 :         {
         192                 :           /* If this really is a threaded program, then we must ensure that
         193                 :              __gthread_active has been set to 1 before exiting this block.  */
         194                 :           __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
         195                 :           __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
         196                 :           __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
         197                 :         }
         198                 :
         199                 :       /* Make sure we'll never enter this block again.  */
         200                 :       if (__gthread_active < 0)
         201                 :         __gthread_active = 0;
         202                 :
         203                 :       __gthread_active_latest_value = __gthread_active;
         204                 :     }
         205                 :
         206                 :   return __gthread_active_latest_value != 0;
         207                 : }
         208                 :
         209                 : #else /* neither FreeBSD nor Solaris */
         210                 :
         211                 : static inline int
         212               0 : __gthread_active_p (void)
         213                 : {
         214                 :   static void *const __gthread_active_ptr
         215                 :     = __extension__ (void *) &__gthrw_(pthread_cancel);
         216               0 :   return __gthread_active_ptr != 0;
         217                 : }
         218                 :
         219                 : #endif /* FreeBSD or Solaris */
         220                 :
         221                 : #else /* not __GXX_WEAK__ */
         222                 :
         223                 : /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
         224                 :    calls in shared flavors of the HP-UX C library.  Most of the stubs
         225                 :    have no functionality.  The details are described in the "libc cumulative
         226                 :    patch" for each subversion of HP-UX 11.  There are two special interfaces
         227                 :    provided for checking whether an application is linked to a pthread
         228                 :    library or not.  However, these interfaces aren't available in early
         229                 :    libc versions.  We also can't use pthread_once as some libc versions
         230                 :    call the init function.  So, we use pthread_create to check whether it
         231                 :    is possible to create a thread or not.  The stub implementation returns
         232                 :    the error number ENOSYS.  */
         233                 :
         234                 : #if defined(__hppa__) && defined(__hpux__)
         235                 :
         236                 : #include <errno.h>
         237                 :
         238                 : static volatile int __gthread_active = -1;
         239                 :
         240                 : static void *
         241                 : __gthread_start (void *arg __attribute__((unused)))
         242                 : {
         243                 :   return NULL;
         244                 : }
         245                 :
         246                 : static void __gthread_active_init (void) __attribute__((noinline));
         247                 : static void
         248                 : __gthread_active_init (void)
         249                 : {
         250                 :   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
         251                 :   pthread_t t;
         252                 :   pthread_attr_t a;
         253                 :   int result;
         254                 :
         255                 :   __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
         256                 :   if (__gthread_active < 0)
         257                 :     {
         258                 :       __gthrw_(pthread_attr_init) (&a);
         259                 :       __gthrw_(pthread_attr_setdetachstate) (&a, PTHREAD_CREATE_DETACHED);
         260                 :       result = __gthrw_(pthread_create) (&t, &a, __gthread_start, NULL);
         261                 :       if (result != ENOSYS)
         262                 :         __gthread_active = 1;
         263                 :       else
         264                 :         __gthread_active = 0;
         265                 :       __gthrw_(pthread_attr_destroy) (&a);
         266                 :     }
         267                 :   __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
         268                 : }
         269                 :
         270                 : static inline int
         271                 : __gthread_active_p (void)
         272                 : {
         273                 :   /* Avoid reading __gthread_active twice on the main code path.  */
         274                 :   int __gthread_active_latest_value = __gthread_active;
         275                 :
         276                 :   /* This test is not protected to avoid taking a lock on the main code
         277                 :      path so every update of __gthread_active in a threaded program must
         278                 :      be atomic with regard to the result of the test.  */
         279                 :   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
         280                 :     {
         281                 :       __gthread_active_init ();
         282                 :       __gthread_active_latest_value = __gthread_active;
         283                 :     }
         284                 :
         285                 :   return __gthread_active_latest_value != 0;
         286                 : }
         287                 :
         288                 : #else /* not hppa-hpux */
         289                 :
         290                 : static inline int
         291                 : __gthread_active_p (void)
         292                 : {
         293                 :   return 1;
         294                 : }
         295                 :
         296                 : #endif /* hppa-hpux */
         297                 :
         298                 : #endif /* __GXX_WEAK__ */
         299                 :
         300                 : #ifdef _LIBOBJC
         301                 :
         302                 : /* This is the config.h file in libobjc/ */
         303                 : #include <config.h>
         304                 :
         305                 : #ifdef HAVE_SCHED_H
         306                 : # include <sched.h>
         307                 : #endif
         308                 :
         309                 : /* Key structure for maintaining thread specific storage */
         310                 : static pthread_key_t _objc_thread_storage;
         311                 : static pthread_attr_t _objc_thread_attribs;
         312                 :
         313                 : /* Thread local storage for a single thread */
         314                 : static void *thread_local_storage = NULL;
         315                 :
         316                 : /* Backend initialization functions */
         317                 :
         318                 : /* Initialize the threads subsystem.  */
         319                 : static inline int
         320                 : __gthread_objc_init_thread_system (void)
         321                 : {
         322                 :   if (__gthread_active_p ())
         323                 :     {
         324                 :       /* Initialize the thread storage key.  */
         325                 :       if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
         326                 :         {
         327                 :           /* The normal default detach state for threads is
         328                 :            * PTHREAD_CREATE_JOINABLE which causes threads to not die
         329                 :            * when you think they should.  */
         330                 :           if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
         331                 :               && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
         332                 :                                               PTHREAD_CREATE_DETACHED) == 0)
         333                 :             return 0;
         334                 :         }
         335                 :     }
         336                 :
         337                 :   return -1;
         338                 : }
         339                 :
         340                 : /* Close the threads subsystem.  */
         341                 : static inline int
         342                 : __gthread_objc_close_thread_system (void)
         343                 : {
         344                 :   if (__gthread_active_p ()
         345                 :       && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
         346                 :       && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
         347                 :     return 0;
         348                 :
         349                 :   return -1;
         350                 : }
         351                 :
         352                 : /* Backend thread functions */
         353                 :
         354                 : /* Create a new thread of execution.  */
         355                 : static inline objc_thread_t
         356                 : __gthread_objc_thread_detach (void (*func)(void *), void *arg)
         357                 : {
         358                 :   objc_thread_t thread_id;
         359                 :   pthread_t new_thread_handle;
         360                 :
         361                 :   if (!__gthread_active_p ())
         362                 :     return NULL;
         363                 :
         364                 :   if (!(__gthrw_(pthread_create) (&new_thread_handle, NULL, (void *) func, arg)))
         365                 :     thread_id = (objc_thread_t) new_thread_handle;
         366                 :   else
         367                 :     thread_id = NULL;
         368                 :
         369                 :   return thread_id;
         370                 : }
         371                 :
         372                 : /* Set the current thread's priority.  */
         373                 : static inline int
         374                 : __gthread_objc_thread_set_priority (int priority)
         375                 : {
         376                 :   if (!__gthread_active_p ())
         377                 :     return -1;
         378                 :   else
         379                 :     {
         380                 : #ifdef _POSIX_PRIORITY_SCHEDULING
         381                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
         382                 :       pthread_t thread_id = __gthrw_(pthread_self) ();
         383                 :       int policy;
         384                 :       struct sched_param params;
         385                 :       int priority_min, priority_max;
         386                 :
         387                 :       if (__gthrw_(pthread_getschedparam) (thread_id, &policy, &params) == 0)
         388                 :         {
         389                 :           if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
         390                 :             return -1;
         391                 :
         392                 :           if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
         393                 :             return -1;
         394                 :
         395                 :           if (priority > priority_max)
         396                 :             priority = priority_max;
         397                 :           else if (priority < priority_min)
         398                 :             priority = priority_min;
         399                 :           params.sched_priority = priority;
         400                 :
         401                 :           /*
         402                 :            * The solaris 7 and several other man pages incorrectly state that
         403                 :            * this should be a pointer to policy but pthread.h is universally
         404                 :            * at odds with this.
         405                 :            */
         406                 :           if (__gthrw_(pthread_setschedparam) (thread_id, policy, &params) == 0)
         407                 :             return 0;
         408                 :         }
         409                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
         410                 : #endif /* _POSIX_PRIORITY_SCHEDULING */
         411                 :       return -1;
         412                 :     }
         413                 : }
         414                 :
         415                 : /* Return the current thread's priority.  */
         416                 : static inline int
         417                 : __gthread_objc_thread_get_priority (void)
         418                 : {
         419                 : #ifdef _POSIX_PRIORITY_SCHEDULING
         420                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
         421                 :   if (__gthread_active_p ())
         422                 :     {
         423                 :       int policy;
         424                 :       struct sched_param params;
         425                 :
         426                 :       if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, &params) == 0)
         427                 :         return params.sched_priority;
         428                 :       else
         429                 :         return -1;
         430                 :     }
         431                 :   else
         432                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
         433                 : #endif /* _POSIX_PRIORITY_SCHEDULING */
         434                 :     return OBJC_THREAD_INTERACTIVE_PRIORITY;
         435                 : }
         436                 :
         437                 : /* Yield our process time to another thread.  */
         438                 : static inline void
         439                 : __gthread_objc_thread_yield (void)
         440                 : {
         441                 :   if (__gthread_active_p ())
         442                 :     __gthrw_(sched_yield) ();
         443                 : }
         444                 :
         445                 : /* Terminate the current thread.  */
         446                 : static inline int
         447                 : __gthread_objc_thread_exit (void)
         448                 : {
         449                 :   if (__gthread_active_p ())
         450                 :     /* exit the thread */
         451                 :     __gthrw_(pthread_exit) (&__objc_thread_exit_status);
         452                 :
         453                 :   /* Failed if we reached here */
         454                 :   return -1;
         455                 : }
         456                 :
         457                 : /* Returns an integer value which uniquely describes a thread.  */
         458                 : static inline objc_thread_t
         459                 : __gthread_objc_thread_id (void)
         460                 : {
         461                 :   if (__gthread_active_p ())
         462                 :     return (objc_thread_t) __gthrw_(pthread_self) ();
         463                 :   else
         464                 :     return (objc_thread_t) 1;
         465                 : }
         466                 :
         467                 : /* Sets the thread's local storage pointer.  */
         468                 : static inline int
         469                 : __gthread_objc_thread_set_data (void *value)
         470                 : {
         471                 :   if (__gthread_active_p ())
         472                 :     return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
         473                 :   else
         474                 :     {
         475                 :       thread_local_storage = value;
         476                 :       return 0;
         477                 :     }
         478                 : }
         479                 :
         480                 : /* Returns the thread's local storage pointer.  */
         481                 : static inline void *
         482                 : __gthread_objc_thread_get_data (void)
         483                 : {
         484                 :   if (__gthread_active_p ())
         485                 :     return __gthrw_(pthread_getspecific) (_objc_thread_storage);
         486                 :   else
         487                 :     return thread_local_storage;
         488                 : }
         489                 :
         490                 : /* Backend mutex functions */
         491                 :
         492                 : /* Allocate a mutex.  */
         493                 : static inline int
         494                 : __gthread_objc_mutex_allocate (objc_mutex_t mutex)
         495                 : {
         496                 :   if (__gthread_active_p ())
         497                 :     {
         498                 :       mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
         499                 :
         500                 :       if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
         501                 :         {
         502                 :           objc_free (mutex->backend);
         503                 :           mutex->backend = NULL;
         504                 :           return -1;
         505                 :         }
         506                 :     }
         507                 :
         508                 :   return 0;
         509                 : }
         510                 :
         511                 : /* Deallocate a mutex.  */
         512                 : static inline int
         513                 : __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
         514                 : {
         515                 :   if (__gthread_active_p ())
         516                 :     {
         517                 :       int count;
         518                 :
         519                 :       /*
         520                 :        * Posix Threads specifically require that the thread be unlocked
         521                 :        * for __gthrw_(pthread_mutex_destroy) to work.
         522                 :        */
         523                 :
         524                 :       do
         525                 :         {
         526                 :           count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
         527                 :           if (count < 0)
         528                 :             return -1;
         529                 :         }
         530                 :       while (count);
         531                 :
         532                 :       if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
         533                 :         return -1;
         534                 :
         535                 :       objc_free (mutex->backend);
         536                 :       mutex->backend = NULL;
         537                 :     }
         538                 :   return 0;
         539                 : }
         540                 :
         541                 : /* Grab a lock on a mutex.  */
         542                 : static inline int
         543                 : __gthread_objc_mutex_lock (objc_mutex_t mutex)
         544                 : {
         545                 :   if (__gthread_active_p ()
         546                 :       && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
         547                 :     {
         548                 :       return -1;
         549                 :     }
         550                 :
         551                 :   return 0;
         552                 : }
         553                 :
         554                 : /* Try to grab a lock on a mutex.  */
         555                 : static inline int
         556                 : __gthread_objc_mutex_trylock (objc_mutex_t mutex)
         557                 : {
         558                 :   if (__gthread_active_p ()
         559                 :       && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
         560                 :     {
         561                 :       return -1;
         562                 :     }
         563                 :
         564                 :   return 0;
         565                 : }
         566                 :
         567                 : /* Unlock the mutex */
         568                 : static inline int
         569                 : __gthread_objc_mutex_unlock (objc_mutex_t mutex)
         570                 : {
         571                 :   if (__gthread_active_p ()
         572                 :       && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
         573                 :     {
         574                 :       return -1;
         575                 :     }
         576                 :
         577                 :   return 0;
         578                 : }
         579                 :
         580                 : /* Backend condition mutex functions */
         581                 :
         582                 : /* Allocate a condition.  */
         583                 : static inline int
         584                 : __gthread_objc_condition_allocate (objc_condition_t condition)
         585                 : {
         586                 :   if (__gthread_active_p ())
         587                 :     {
         588                 :       condition->backend = objc_malloc (sizeof (pthread_cond_t));
         589                 :
         590                 :       if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
         591                 :         {
         592                 :           objc_free (condition->backend);
         593                 :           condition->backend = NULL;
         594                 :           return -1;
         595                 :         }
         596                 :     }
         597                 :
         598                 :   return 0;
         599                 : }
         600                 :
         601                 : /* Deallocate a condition.  */
         602                 : static inline int
         603                 : __gthread_objc_condition_deallocate (objc_condition_t condition)
         604                 : {
         605                 :   if (__gthread_active_p ())
         606                 :     {
         607                 :       if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
         608                 :         return -1;
         609                 :
         610                 :       objc_free (condition->backend);
         611                 :       condition->backend = NULL;
         612                 :     }
         613                 :   return 0;
         614                 : }
         615                 :
         616                 : /* Wait on the condition */
         617                 : static inline int
         618                 : __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
         619                 : {
         620                 :   if (__gthread_active_p ())
         621                 :     return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
         622                 :                               (pthread_mutex_t *) mutex->backend);
         623                 :   else
         624                 :     return 0;
         625                 : }
         626                 :
         627                 : /* Wake up all threads waiting on this condition.  */
         628                 : static inline int
         629                 : __gthread_objc_condition_broadcast (objc_condition_t condition)
         630                 : {
         631                 :   if (__gthread_active_p ())
         632                 :     return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
         633                 :   else
         634                 :     return 0;
         635                 : }
         636                 :
         637                 : /* Wake up one thread waiting on this condition.  */
         638                 : static inline int
         639                 : __gthread_objc_condition_signal (objc_condition_t condition)
         640                 : {
         641                 :   if (__gthread_active_p ())
         642                 :     return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
         643                 :   else
         644                 :     return 0;
         645                 : }
         646                 :
         647                 : #else /* _LIBOBJC */
         648                 :
         649                 : static inline int
         650                 : __gthread_once (__gthread_once_t *once, void (*func) (void))
         651                 : {
         652                 :   if (__gthread_active_p ())
         653                 :     return __gthrw_(pthread_once) (once, func);
         654                 :   else
         655                 :     return -1;
         656                 : }
         657                 :
         658                 : static inline int
         659                 : __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
         660                 : {
         661                 :   return __gthrw_(pthread_key_create) (key, dtor);
         662                 : }
         663                 :
         664                 : static inline int
         665                 : __gthread_key_delete (__gthread_key_t key)
         666                 : {
         667                 :   return __gthrw_(pthread_key_delete) (key);
         668                 : }
         669                 :
         670                 : static inline void *
         671                 : __gthread_getspecific (__gthread_key_t key)
         672                 : {
         673                 :   return __gthrw_(pthread_getspecific) (key);
         674                 : }
         675                 :
         676                 : static inline int
         677                 : __gthread_setspecific (__gthread_key_t key, const void *ptr)
         678                 : {
         679                 :   return __gthrw_(pthread_setspecific) (key, ptr);
         680                 : }
         681                 :
         682                 : static inline int
         683                 : __gthread_mutex_lock (__gthread_mutex_t *mutex)
         684                 : {
         685                 :   if (__gthread_active_p ())
         686                 :     return __gthrw_(pthread_mutex_lock) (mutex);
         687                 :   else
         688                 :     return 0;
         689                 : }
         690                 :
         691                 : static inline int
         692                 : __gthread_mutex_trylock (__gthread_mutex_t *mutex)
         693                 : {
         694                 :   if (__gthread_active_p ())
         695                 :     return __gthrw_(pthread_mutex_trylock) (mutex);
         696                 :   else
         697                 :     return 0;
         698                 : }
         699                 :
         700                 : static inline int
         701                 : __gthread_mutex_unlock (__gthread_mutex_t *mutex)
         702                 : {
         703                 :   if (__gthread_active_p ())
         704                 :     return __gthrw_(pthread_mutex_unlock) (mutex);
         705                 :   else
         706                 :     return 0;
         707                 : }
         708                 :
         709                 : #ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
         710                 : static inline int
         711                 : __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
         712                 : {
         713                 :   if (__gthread_active_p ())
         714                 :     {
         715                 :       pthread_mutexattr_t attr;
         716                 :       int r;
         717                 :
         718                 :       r = __gthrw_(pthread_mutexattr_init) (&attr);
         719                 :       if (!r)
         720                 :         r = __gthrw_(pthread_mutexattr_settype) (&attr, PTHREAD_MUTEX_RECURSIVE);
         721                 :       if (!r)
         722                 :         r = __gthrw_(pthread_mutex_init) (mutex, &attr);
         723                 :       if (!r)
         724                 :         r = __gthrw_(pthread_mutexattr_destroy) (&attr);
         725                 :       return r;
         726                 :     }
         727                 :   return 0;
         728                 : }
         729                 : #endif
         730                 :
         731                 : static inline int
         732                 : __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
         733                 : {
         734                 :   return __gthread_mutex_lock (mutex);
         735                 : }
         736                 :
         737                 : static inline int
         738                 : __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
         739                 : {
         740                 :   return __gthread_mutex_trylock (mutex);
         741                 : }
         742                 :
         743                 : static inline int
         744                 : __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
         745                 : {
         746                 :   return __gthread_mutex_unlock (mutex);
         747                 : }
         748                 :
         749                 : static inline int
         750                 : __gthread_cond_broadcast (__gthread_cond_t *cond)
         751                 : {
         752                 :   return __gthrw_(pthread_cond_broadcast) (cond);
         753                 : }
         754                 :
         755                 : static inline int
         756                 : __gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex)
         757                 : {
         758                 :   return __gthrw_(pthread_cond_wait) (cond, mutex);
         759                 : }
         760                 :
         761                 : static inline int
         762                 : __gthread_cond_wait_recursive (__gthread_cond_t *cond,
         763                 :                                __gthread_recursive_mutex_t *mutex)
         764                 : {
         765                 :   return __gthread_cond_wait (cond, mutex);
         766                 : }
         767                 :
         768                 : #endif /* _LIBOBJC */
         769                 :
         770                 : #endif /* ! _GLIBCXX_GCC_GTHR_POSIX_H */

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