summaryrefslogtreecommitdiff
path: root/lib/glthread/lock.h
diff options
context:
space:
mode:
Diffstat (limited to 'lib/glthread/lock.h')
-rw-r--r--lib/glthread/lock.h151
1 files changed, 4 insertions, 147 deletions
diff --git a/lib/glthread/lock.h b/lib/glthread/lock.h
index 2d5cb320..2b9c0f2e 100644
--- a/lib/glthread/lock.h
+++ b/lib/glthread/lock.h
@@ -64,13 +64,6 @@
Taking the lock: err = glthread_recursive_lock_lock (&name);
Releasing the lock: err = glthread_recursive_lock_unlock (&name);
De-initialization: err = glthread_recursive_lock_destroy (&name);
-
- Once-only execution:
- Type: gl_once_t
- Initializer: gl_once_define(extern, name)
- Execution: gl_once (name, initfunction);
- Equivalent functions with control of error handling:
- Execution: err = glthread_once (&name, initfunction);
*/
@@ -88,17 +81,9 @@
#include <errno.h>
#include <stdlib.h>
-#if !defined c11_threads_in_use
-# if HAVE_THREADS_H && USE_POSIX_THREADS_FROM_LIBC
-# define c11_threads_in_use() 1
-# elif HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
-# include <threads.h>
-# pragma weak thrd_exit
-# define c11_threads_in_use() (thrd_exit != NULL)
-# else
-# define c11_threads_in_use() 0
-# endif
-#endif
+#include "glthread/once.h"
+
+/* c11_threads_in_use() is defined in glthread/once.h. */
/* ========================================================================= */
@@ -195,14 +180,6 @@ extern int glthread_recursive_lock_lock (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_unlock (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_destroy (gl_recursive_lock_t *lock);
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef once_flag gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
- STORAGECLASS once_flag NAME = ONCE_FLAG_INIT;
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
- (call_once (ONCE_CONTROL, INITFUNCTION), 0)
-
# ifdef __cplusplus
}
# endif
@@ -221,80 +198,7 @@ typedef once_flag gl_once_t;
extern "C" {
# endif
-# if PTHREAD_IN_USE_DETECTION_HARD
-
-/* The pthread_in_use() detection needs to be done at runtime. */
-# define pthread_in_use() \
- glthread_in_use ()
-extern int glthread_in_use (void);
-
-# endif
-
-# if USE_POSIX_THREADS_WEAK
-
-/* Use weak references to the POSIX threads library. */
-
-/* Weak references avoid dragging in external libraries if the other parts
- of the program don't use them. Here we use them, because we don't want
- every program that uses libintl to depend on libpthread. This assumes
- that libpthread would not be loaded after libintl; i.e. if libintl is
- loaded first, by an executable that does not depend on libpthread, and
- then a module is dynamically loaded that depends on libpthread, libintl
- will not be multithread-safe. */
-
-/* The way to test at runtime whether libpthread is present is to test
- whether a function pointer's value, such as &pthread_mutex_init, is
- non-NULL. However, some versions of GCC have a bug through which, in
- PIC mode, &foo != NULL always evaluates to true if there is a direct
- call to foo(...) in the same function. To avoid this, we test the
- address of a function in libpthread that we don't use. */
-
-# pragma weak pthread_mutex_init
-# pragma weak pthread_mutex_lock
-# pragma weak pthread_mutex_unlock
-# pragma weak pthread_mutex_destroy
-# pragma weak pthread_rwlock_init
-# pragma weak pthread_rwlock_rdlock
-# pragma weak pthread_rwlock_wrlock
-# pragma weak pthread_rwlock_unlock
-# pragma weak pthread_rwlock_destroy
-# pragma weak pthread_once
-# pragma weak pthread_cond_init
-# pragma weak pthread_cond_wait
-# pragma weak pthread_cond_signal
-# pragma weak pthread_cond_broadcast
-# pragma weak pthread_cond_destroy
-# pragma weak pthread_mutexattr_init
-# pragma weak pthread_mutexattr_settype
-# pragma weak pthread_mutexattr_destroy
-# pragma weak pthread_rwlockattr_init
-# if __GNU_LIBRARY__ > 1
-# pragma weak pthread_rwlockattr_setkind_np
-# endif
-# pragma weak pthread_rwlockattr_destroy
-# ifndef pthread_self
-# pragma weak pthread_self
-# endif
-
-# if !PTHREAD_IN_USE_DETECTION_HARD
- /* Considering all platforms with USE_POSIX_THREADS_WEAK, only few symbols
- can be used to determine whether libpthread is in use. These are:
- pthread_mutexattr_gettype
- pthread_rwlockattr_destroy
- pthread_rwlockattr_init
- */
-# pragma weak pthread_mutexattr_gettype
-# define pthread_in_use() \
- (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
-# endif
-
-# else
-
-# if !PTHREAD_IN_USE_DETECTION_HARD
-# define pthread_in_use() 1
-# endif
-
-# endif
+/* pthread_in_use() is defined in glthread/once.h. */
/* -------------------------- gl_lock_t datatype -------------------------- */
@@ -510,26 +414,6 @@ extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *l
# endif
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef pthread_once_t gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
- STORAGECLASS pthread_once_t NAME = PTHREAD_ONCE_INIT;
-# if PTHREAD_IN_USE_DETECTION_HARD || USE_POSIX_THREADS_WEAK
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
- (pthread_in_use () \
- ? pthread_once (ONCE_CONTROL, INITFUNCTION) \
- : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
-# else
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
- (pthread_in_use () \
- ? glthread_once_multithreaded (ONCE_CONTROL, INITFUNCTION) \
- : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
-extern int glthread_once_multithreaded (pthread_once_t *once_control,
- void (*init_function) (void));
-# endif
-extern int glthread_once_singlethreaded (pthread_once_t *once_control);
-
# ifdef __cplusplus
}
# endif
@@ -546,7 +430,6 @@ extern int glthread_once_singlethreaded (pthread_once_t *once_control);
# include "windows-mutex.h"
# include "windows-rwlock.h"
# include "windows-recmutex.h"
-# include "windows-once.h"
# ifdef __cplusplus
extern "C" {
@@ -619,14 +502,6 @@ typedef glwthread_recmutex_t gl_recursive_lock_t;
# define glthread_recursive_lock_destroy(LOCK) \
glwthread_recmutex_destroy (LOCK)
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef glwthread_once_t gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
- STORAGECLASS gl_once_t NAME = GLWTHREAD_ONCE_INIT;
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
- (glwthread_once (ONCE_CONTROL, INITFUNCTION), 0)
-
# ifdef __cplusplus
}
# endif
@@ -670,14 +545,6 @@ typedef int gl_recursive_lock_t;
# define glthread_recursive_lock_unlock(NAME) 0
# define glthread_recursive_lock_destroy(NAME) 0
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef int gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
- STORAGECLASS gl_once_t NAME = 0;
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
- (*(ONCE_CONTROL) == 0 ? (*(ONCE_CONTROL) = ~ 0, INITFUNCTION (), 0) : 0)
-
#endif
/* ========================================================================= */
@@ -784,16 +651,6 @@ typedef int gl_once_t;
} \
while (0)
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-#define gl_once(NAME, INITFUNCTION) \
- do \
- { \
- if (glthread_once (&NAME, INITFUNCTION)) \
- abort (); \
- } \
- while (0)
-
/* ========================================================================= */
#endif /* _LOCK_H */
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 02:59:20 +0000