Copy from trunk.

1 files changed, 88 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/bits/uClibc_mutex.h b/libc/sysdeps/linux/common/bits/uClibc_mutex.h
new file mode 100644
index 000000000..b202a6bd2
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/uClibc_mutex.h
@@ -0,0 +1,88 @@
+/* Copyright (C) 2006   Manuel Novoa III    <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#ifndef _UCLIBC_MUTEX_H
+#define _UCLIBC_MUTEX_H
+
+#include <features.h>
+
+#ifdef __UCLIBC_HAS_THREADS__
+
+#include <pthread.h>
+#include <bits/uClibc_pthread.h>
+
+#define __UCLIBC_MUTEX_TYPE				pthread_mutex_t
+
+#define __UCLIBC_MUTEX(M)				pthread_mutex_t M
+#define __UCLIBC_MUTEX_INIT(M,I)			pthread_mutex_t M = I
+#define __UCLIBC_MUTEX_STATIC(M,I)			static pthread_mutex_t M = I
+#define __UCLIBC_MUTEX_EXTERN(M)			extern pthread_mutex_t M
+
+#define __UCLIBC_MUTEX_LOCK_CANCEL_UNSAFE(M)								\
+		__pthread_mutex_lock(&(M))
+
+#define __UCLIBC_MUTEX_UNLOCK_CANCEL_UNSAFE(M)								\
+		__pthread_mutex_unlock(&(M))
+
+#define __UCLIBC_MUTEX_TRYLOCK_CANCEL_UNSAFE(M)								\
+		__pthread_mutex_trylock(&(M))
+
+#define __UCLIBC_MUTEX_CONDITIONAL_LOCK(M,C)								\
+	do {												\
+		struct _pthread_cleanup_buffer __infunc_pthread_cleanup_buffer;				\
+		if (C) {										\
+			_pthread_cleanup_push_defer(&__infunc_pthread_cleanup_buffer,			\
+										__uclibc_mutex_unlock,	\
+										&(M));			\
+			__pthread_mutex_lock(&(M));							\
+		}											\
+		((void)0)
+
+#define __UCLIBC_MUTEX_CONDITIONAL_UNLOCK(M,C)								\
+		if (C) {										\
+			_pthread_cleanup_pop_restore(&__infunc_pthread_cleanup_buffer,1);		\
+		}											\
+	} while (0)
+
+#define __UCLIBC_MUTEX_AUTO_LOCK_VAR(A)		int A
+
+#define __UCLIBC_MUTEX_AUTO_LOCK(M,A,V)									\
+        __UCLIBC_MUTEX_CONDITIONAL_LOCK(M,((A=(V)) == 0))
+
+#define __UCLIBC_MUTEX_AUTO_UNLOCK(M,A)									\
+        __UCLIBC_MUTEX_CONDITIONAL_UNLOCK(M,(A == 0))
+
+#define __UCLIBC_MUTEX_LOCK(M)										\
+        __UCLIBC_MUTEX_CONDITIONAL_LOCK(M, 1)
+
+#define __UCLIBC_MUTEX_UNLOCK(M)									\
+        __UCLIBC_MUTEX_CONDITIONAL_UNLOCK(M, 1)
+
+#else
+
+#define __UCLIBC_MUTEX(M)				void *__UCLIBC_MUTEX_DUMMY_ ## M
+#define __UCLIBC_MUTEX_INIT(M,I)			extern void *__UCLIBC_MUTEX_DUMMY_ ## M
+#define __UCLIBC_MUTEX_STATIC(M,I)			extern void *__UCLIBC_MUTEX_DUMMY_ ## M
+#define __UCLIBC_MUTEX_EXTERN(M)			extern void *__UCLIBC_MUTEX_DUMMY_ ## M
+
+#define __UCLIBC_MUTEX_LOCK_CANCEL_UNSAFE(M)		((void)0)
+#define __UCLIBC_MUTEX_UNLOCK_CANCEL_UNSAFE(M)		((void)0)
+#define __UCLIBC_MUTEX_TRYLOCK_CANCEL_UNSAFE(M)		(0)	/* Always succeed? */
+
+#define __UCLIBC_MUTEX_CONDITIONAL_LOCK(M,C)		((void)0)
+#define __UCLIBC_MUTEX_CONDITIONAL_UNLOCK(M,C)		((void)0)
+
+#define __UCLIBC_MUTEX_AUTO_LOCK_VAR(A)			((void)0)
+#define __UCLIBC_MUTEX_AUTO_LOCK(M,A,V)			((void)0)
+#define __UCLIBC_MUTEX_AUTO_UNLOCK(M,A)			((void)0)
+
+#define __UCLIBC_MUTEX_LOCK(M)				((void)0)
+#define __UCLIBC_MUTEX_UNLOCK(M)			((void)0)
+
+#endif
+
+#endif /* _UCLIBC_MUTEX_H */