/* Written by Paul Eggert and Glen Lenker. */
+#ifndef _GL_PTHREAD_H_
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard. */
+#if @HAVE_PTHREAD_H@
+# @INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+#endif
+
#ifndef _GL_PTHREAD_H_
#define _GL_PTHREAD_H_
#include <sys/types.h>
#include <time.h>
-#ifndef HAVE_PTHREAD_T
+#if ! @HAVE_PTHREAD_T@
typedef int pthread_t;
typedef int pthread_attr_t;
typedef int pthread_barrier_t;
typedef int pthread_once_t;
typedef int pthread_rwlock_t;
typedef int pthread_rwlockattr_t;
- typedef int pthread_spinlock_t;
#endif
+#ifndef PTHREAD_COND_INITIALIZER
#define PTHREAD_COND_INITIALIZER { 0 }
#define PTHREAD_MUTEX_INITIALIZER { 0 }
#define PTHREAD_ONCE_INIT { 0 }
#define PTHREAD_SCOPE_SYSTEM 0
#define PTHREAD_SCOPE_PROCESS 1
+#endif
+
+#if ! @HAVE_PTHREAD_T@
/* Provide substitutes for the thread functions that should work
adequately on a single-threaded implementation, where
return 0;
}
+static inline int
+pthread_mutexattr_destroy (pthread_mutexattr_t *attr)
+{
+ return 0;
+}
+
+static inline int
+pthread_mutexattr_init (pthread_mutexattr_t *attr)
+{
+ return 0;
+}
+
+static inline int
+pthread_mutexattr_settype (pthread_mutexattr_t *attr, int attr_type)
+{
+ return 0;
+}
+
static inline int
pthread_mutex_destroy (pthread_mutex_t *mutex)
{
return 0;
}
+static inline int
+pthread_mutex_trylock (pthread_mutex_t *mutex)
+{
+ return pthread_mutex_lock (mutex);
+}
+
static inline int
pthread_mutex_unlock (pthread_mutex_t *mutex)
{
return 0;
}
+#endif
+
+#if ! @HAVE_PTHREAD_SPINLOCK_T@
+
+/* Approximate spinlocks with mutexes. */
+
+typedef pthread_mutex_t pthread_spinlock_t;
+
static inline int
pthread_spin_init (pthread_spinlock_t *lock, int pshared)
{
- /* LOCK is never seriously used. */
- return 0;
+ return pthread_mutex_init (lock, NULL);
+}
+
+static inline int
+pthread_spin_destroy (pthread_spinlock_t *lock)
+{
+ return pthread_mutex_destroy (lock);
}
static inline int
pthread_spin_lock (pthread_spinlock_t *lock)
{
- /* Only one thread, so it always gets the lock. */
- return 0;
+ return pthread_mutex_lock (lock);
}
static inline int
pthread_spin_trylock (pthread_spinlock_t *lock)
{
- /* Only one thread, so it always gets the lock. Assume that a
- thread never tries a lock that it already holds. */
- return 0;
+ return pthread_mutex_trylock (lock);
}
static inline int
pthread_spin_unlock (pthread_spinlock_t *lock)
{
- /* Only one thread, so spin locks are no-ops. */
- return 0;
+ return pthread_mutex_unlock (lock);
}
+#endif
#endif /* _GL_PTHREAD_H_ */
+#endif /* _GL_PTHREAD_H_ */