/* Basic platform-independent macro definitions for mutexes and
thread-specific data.
- Copyright (C) 1996 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>, 1996.
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
+/* $Id$
+ 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
+#undef thread_atfork_static
+
#if defined(_LIBC) /* The GNU C library, a special case of Posix threads */
-#include <libc-lock.h>
+#include <bits/libc-lock.h>
#ifdef PTHREAD_MUTEX_INITIALIZER
/* mutex */
typedef pthread_mutex_t mutex_t;
-/* thread specific data */
-typedef pthread_key_t tsd_key_t;
-
#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
-static Void_t *malloc_key_data;
-
-#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 { malloc_key_data = (Void_t *) data; }
-#define tsd_getspecific(key, vptr) \
- (vptr = (__pthread_getspecific != NULL \
- ? __pthread_getspecific(key) : malloc_key_data))
-
#define mutex_init(m) \
(__pthread_mutex_init != NULL ? __pthread_mutex_init (m, NULL) : 0)
#define mutex_lock(m) \
#define mutex_unlock(m) \
(__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (m) : 0)
+#define thread_atfork(prepare, parent, child) \
+ (__pthread_atfork != NULL ? __pthread_atfork(prepare, parent, child) : 0)
+
#elif defined(MUTEX_INITIALIZER)
+/* Assume hurd, with cthreads */
-typedef thread_t thread_id;
+/* Cthreads `mutex_t' is a pointer to a mutex, and malloc wants just the
+ mutex itself. */
+#undef mutex_t
+#define mutex_t struct mutex
-/* mutex */
-typedef mutex_t mutex_t;
+#undef mutex_init
+#define mutex_init(m) (__mutex_init(m), 0)
-/* thread specific data */
-typedef pthread_key_t tsd_key_t;
+#undef mutex_lock
+#define mutex_lock(m) (__mutex_lock(m), 0)
+
+#undef mutex_unlock
+#define mutex_unlock(m) (__mutex_unlock(m), 0)
+
+#define mutex_trylock(m) (!__mutex_trylock(m))
-#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)
+#define thread_atfork(prepare, parent, child) do {} while(0)
+#define thread_atfork_static(prepare, parent, child) \
+ text_set_element(_hurd_fork_prepare_hook, prepare); \
+ text_set_element(_hurd_fork_parent_hook, parent); \
+ text_set_element(_hurd_fork_child_hook, child);
+
+/* No we're *not* using pthreads. */
+#define __pthread_initialize ((void (*)(void))0)
#else
#endif /* MUTEX_INITIALIZER && PTHREAD_MUTEX_INITIALIZER */
+#ifndef NO_THREADS
+
+/* thread specific data for glibc */
+
+#include <bits/libc-tsd.h>
+
+typedef int tsd_key_t[0]; /* no key data structure, libc magic does it */
+__libc_tsd_define (, MALLOC) /* declaration/common definition */
+#define tsd_key_create(key, destr) ((void) (key))
+#define tsd_setspecific(key, data) __libc_tsd_set (MALLOC, (data))
+#define tsd_getspecific(key, vptr) ((vptr) = __libc_tsd_get (MALLOC))
+
+#endif
+
#elif defined(USE_PTHREADS) /* Posix threads */
#include <pthread.h>
#define mutex_unlock(m) pthread_mutex_unlock(m)
/* thread specific data */
+#if defined(__sgi) || defined(USE_TSD_DATA_HACK)
+
+/* Hack for thread-specific data, e.g. on Irix 6.x. We can't use
+ pthread_setspecific because that function calls malloc() itself.
+ The hack only works when pthread_t can be converted to an integral
+ type. */
+
+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)pthread_self() % 256] = (data))
+#define tsd_getspecific(key, vptr) \
+ (vptr = key[(unsigned)pthread_self() % 256])
+
+#else
+
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))
+#endif
+
+/* at fork */
+#define thread_atfork(prepare, parent, child) \
+ pthread_atfork(prepare, parent, child)
+
#elif USE_THR /* Solaris threads */
#include <thread.h>
#define tsd_setspecific(key, data) (key[(unsigned)thr_self() % 256] = (data))
#define tsd_getspecific(key, vptr) (vptr = key[(unsigned)thr_self() % 256])
+#define thread_atfork(prepare, parent, child) do {} while(0)
+
#elif USE_SPROC /* SGI sproc() threads */
#include <sys/wait.h>
#define tsd_setspecific(key, data) (((void **)(&PRDA->usr_prda))[key] = data)
#define tsd_getspecific(key, vptr) (vptr = ((void **)(&PRDA->usr_prda))[key])
+#define thread_atfork(prepare, parent, child) do {} while(0)
+
#else /* no _LIBC or USE_... are defined */
#define NO_THREADS
#define tsd_setspecific(key, data) do {} while(0)
#define tsd_getspecific(key, vptr) (vptr = NULL)
+#define thread_atfork(prepare, parent, child) do {} while(0)
+
#endif /* defined(NO_THREADS) */
#endif /* !defined(_THREAD_M_H) */
projects / kopensolaris-gnu / glibc.git / blobdiff