* cygwin.din: Add sem_close, sem_getvalue, sem_open and sem_timedwait.

	* pthread.cc (+mangle_sem_name): New function.
	(sem_open): Ditto.
	(sem_close: Ditto.
	(sem_timedwait): Ditto.
	(sem_getvalue): Ditto.
	* thread.cc (semaphore::semaphore): Rearrange member initialization.
	Use appropriate security attribute for process shared semaphores.
	(semaphore::semaphore): New constructor for named semaphores.
	(semaphore::~semaphore): Care for semaphore name.
	(semaphore::_post): Accomodate failing ReleaseSemaphore. Use value
	returned by ReleaseSemaphore vor currentvalue.
	(semaphore::_getvalue): New method.
	(semaphore::_timedwait): Ditto.
	(semaphore::_fixup_after_fork): Rearrange. Don't fail for process
	shared semaphores.
	(semaphore::open): New method.
	(semaphore::timedwait): Ditto.
	(semaphore::post): Fix return value.  Set errno appropriately.
	(semaphore::getvalue): New method.
	* thread.h (class semaphore): Add prototypes for open, getvalue,
	timedwait, _getvalue, _timedwait.  Add prototypes for new constructor.
	Add name member.
	* include/semaphore.h: Add prototypes for sem_open, sem_close,
	sem_timedwait and sem_getvalue.
	include/cygwin/version.h: Bump API minor number.

2 files changed, 6 insertions, 1 deletions

diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index 0e26b0840..a3214e445 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -221,13 +221,14 @@ details. */
 	   optreset, __check_rhosts_file, __rcmd_errstr.
        95: Export shmat, shmctl, shmdt, shmget.
        96: CW_GET_ERRNO_FROM_WINERROR addition to external.cc
+       97: Export sem_open, sem_close, sem_timedwait, sem_getvalue.
 
      */
 
      /* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 96
+#define CYGWIN_VERSION_API_MINOR 97
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible
diff --git a/winsup/cygwin/include/semaphore.h b/winsup/cygwin/include/semaphore.h
index 860c2bfca..96f7c6f88 100644
--- a/winsup/cygwin/include/semaphore.h
+++ b/winsup/cygwin/include/semaphore.h
@@ -30,9 +30,13 @@ extern "C"
 /* Semaphores */
   int sem_init (sem_t * sem, int pshared, unsigned int value);
   int sem_destroy (sem_t * sem);
+  sem_t *sem_open (const char *name, int oflag, ...);
+  int sem_close (sem_t *sem);
   int sem_wait (sem_t * sem);
   int sem_trywait (sem_t * sem);
+  int sem_timedwait (sem_t * sem, const struct timespec *abstime);
   int sem_post (sem_t * sem);
+  int sem_getvalue (sem_t * sem, int *sval);
 
 #ifdef __cplusplus
 }