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Diffstat (limited to 'malloc/thread-m.h')
| -rw-r--r-- | malloc/thread-m.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/malloc/thread-m.h b/malloc/thread-m.h new file mode 100644 index 0000000000..371e49178d --- /dev/null +++ b/malloc/thread-m.h @@ -0,0 +1,176 @@ +/* Basic platform-independent macro definitions for mutexes and + thread-specific data. + Copyright (C) 1996 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* One out of _LIBC, USE_PTHREADS, USE_THR * or USE_SPROC should be + defined, otherwise the token NO_THREADS * and dummy implementations + of the macros will be defined. */ + +#ifndef _THREAD_M_H +#define _THREAD_M_H + +#if defined(_LIBC) /* The GNU C library, a special case of Posix threads */ + +#include <libc-lock.h> + +#ifdef PTHREAD_MUTEX_INITIALIZER + +typedef pthread_t thread_id; + +/* mutex */ +typedef pthread_mutex_t mutex_t; + +/* thread specific data */ +typedef pthread_key_t tsd_key_t; + +#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER + +#define tsd_key_create(key, destr) \ + if (__pthread_key_create != NULL) { \ + __pthread_key_create(key, destr); } else { *(key) = (tsd_key_t) 0; } +#define tsd_setspecific(key, data) \ + if (__pthread_setspecific != NULL) { \ + __pthread_setspecific(key, data); } else { (key) = (tsd_key_t) data; } +#define tsd_getspecific(key, vptr) \ + (vptr = (__pthread_getspecific != NULL ? \ + __pthread_getspecific(key) : (tsd_key_t *) (key))) + +#define mutex_init(m) \ + (__pthread_mutex_init != NULL ? __pthread_mutex_init (m, NULL) : 0) +#define mutex_lock(m) \ + (__pthread_mutex_lock != NULL ? __pthread_mutex_lock (m) : 0) +#define mutex_trylock(m) \ + (__pthread_mutex_trylock != NULL ? __pthread_mutex_trylock (m) : 0) +#define mutex_unlock(m) \ + (__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (m) : 0) + +#elif defined(MUTEX_INITIALIZER) + +typedef thread_t thread_id; + +/* mutex */ +typedef mutex_t mutex_t; + +/* thread specific data */ +typedef pthread_key_t tsd_key_t; + +#define mutex_init(m) __mutex_init (m) +#define mutex_lock(m) __mutex_lock (m) +#define mutex_trylock(m) __mutex_trylock (m) +#define mutex_unlock(m) __mutex_unlock (m) + +#else + +#define NO_THREADS + +#endif /* MUTEX_INITIALIZER && PTHREAD_MUTEX_INITIALIZER */ + +#elif defined(USE_PTHREADS) /* Posix threads */ + +#include <pthread.h> + +typedef pthread_t thread_id; + +/* mutex */ +typedef pthread_mutex_t mutex_t; + +#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER +#define mutex_init(m) pthread_mutex_init(m, NULL) +#define mutex_lock(m) pthread_mutex_lock(m) +#define mutex_trylock(m) pthread_mutex_trylock(m) +#define mutex_unlock(m) pthread_mutex_unlock(m) + +/* thread specific data */ +typedef pthread_key_t tsd_key_t; + +#define tsd_key_create(key, destr) pthread_key_create(key, destr) +#define tsd_setspecific(key, data) pthread_setspecific(key, data) +#define tsd_getspecific(key, vptr) (vptr = pthread_getspecific(key)) + +#elif USE_THR /* Solaris threads */ + +#include <thread.h> + +typedef thread_t thread_id; + +#define MUTEX_INITIALIZER { 0 } +#define mutex_init(m) mutex_init(m, USYNC_THREAD, NULL) + +/* + * Hack for thread-specific data on Solaris. We can't use thr_setspecific + * because that function calls malloc() itself. + */ +typedef void *tsd_key_t[256]; +#define tsd_key_create(key, destr) do { \ + int i; \ + for(i=0; i<256; i++) (*key)[i] = 0; \ +} while(0) +#define tsd_setspecific(key, data) (key[(unsigned)thr_self() % 256] = (data)) +#define tsd_getspecific(key, vptr) (vptr = key[(unsigned)thr_self() % 256]) + +#elif USE_SPROC /* SGI sproc() threads */ + +#include <sys/wait.h> +#include <sys/types.h> +#include <sys/prctl.h> +#include <abi_mutex.h> + +typedef int thread_id; + +typedef abilock_t mutex_t; + +#define MUTEX_INITIALIZER { 0 } +#define mutex_init(m) init_lock(m) +#define mutex_lock(m) (spin_lock(m), 0) +#define mutex_trylock(m) acquire_lock(m) +#define mutex_unlock(m) release_lock(m) + +typedef int tsd_key_t; +int tsd_key_next; +#define tsd_key_create(key, destr) ((*key) = tsd_key_next++) +#define tsd_setspecific(key, data) (((void **)(&PRDA->usr_prda))[key] = data) +#define tsd_getspecific(key, vptr) (vptr = ((void **)(&PRDA->usr_prda))[key]) + +#else /* no _LIBC or USE_... are defined */ + +#define NO_THREADS + +#endif /* defined(_LIBC) */ + +#ifdef NO_THREADS /* No threads, provide dummy macros */ + +typedef int thread_id; + +typedef int mutex_t; + +#define MUTEX_INITIALIZER 0 +#define mutex_init(m) (*(m) = 0) +#define mutex_lock(m) (0) +#define mutex_trylock(m) (0) +#define mutex_unlock(m) (0) + +typedef void *tsd_key_t; +#define tsd_key_create(key, destr) (*(key) = NULL) +#define tsd_setspecific(key, data) ((key) = data) +#define tsd_getspecific(key, vptr) (vptr = (key)) + +#endif /* defined(NO_THREADS) */ + +#endif /* !defined(_THREAD_M_H) */ |