* cygwin.din (sem_unlink): Export.

	* posix_ipc.cc: Include thread.h and semaphore.h.  Remove TODO
	comment.
	(ipc_names): Add max_len member.  Set to maximum length of the path
	before tacking on the prefix path.  Set prefix path for named semaphors
	to /dev/shm, as on Linux.
	(enum ipc_type_t): Change sem to semaphore to avoid name conflicts.
	(check_path): Detect empty paths.  Use ipc_names's max_len member.
	Use __small_sprintf to create full object path name.  Special case
	semaphores.
	(ipc_cond_init): Drop superfluous strcpy.
	(class ipc_flock): New class to simplify file locking in subsequent
	code.
	(struct mq_hdr): Raise size of mqh_uname to allow adding a unique
	LUID to the name.
	(mq_open): Fix formatting.  Create unique synchronization object names
	using AllocateLocallyUniqueId.
	(struct sem_finfo): New structure defining named semaphore file content.
	(sem_open): Move here.  Rework implementation to allow kernel
	persistent implementation of POSIX named semaphores.
	(_sem_close): Implement sem_close.
	(sem_close): Move here.  Just call _sem_close with do_close parameter
	set to true.
	(sem_unlink): New function.
	* pthread.cc (mangle_sem_name): Remove.
	(sem_open): Move to posix_ipc.cc.
	(sem_close): Ditto.
	* syscalls.cc (close_all_files): Call semaphore::terminate here.
	* thread.cc: Fix formatting.  Rearrange semaphore functions so that
	they are close together.
	(semaphore::semaphore): Rework to play nicely with new named semaphore
	implementation.
	(semaphore::_terminate): Call _sem_close if semaphore is a named
	semaphore.
	(semaphore::destroy): Don't destroy named semaphores.  Return EINVAL
	instead.
	(semaphore::close): Only destroy named semaphores.  Return EINVAL
	otherwise.
	(semaphore::open): Rework to play nicely with new named semaphore
	implementation.  Loop through existing semaphores to be able to
	return same sem_t pointer as a former call on the same named semaphore.
	(semaphore::getinternal): New function called from _sem_close.
	* thread.h (class List): Make mx and head public.
	(class semaphore): Fix formatting.  Align method declarations with
	implementation in thread.cc.  Add members used for named semaphores.
	(semaphore::terminate): New static method.
	* include/semaphore.h: Redefine SEM_FAILED.  Fix formatting.
	(sem_unlink): Add declaration.
	* include/cygwin/version.h: Bump API minor number.

1 files changed, 1 insertions, 0 deletions

diff --git a/winsup/cygwin/cygwin.din b/winsup/cygwin/cygwin.din
index 4b016a465..bbb39eeaa 100644
--- a/winsup/cygwin/cygwin.din
+++ b/winsup/cygwin/cygwin.din
@@ -1235,6 +1235,7 @@ sem_open SIGFE
 sem_post SIGFE
 sem_timedwait SIGFE
 sem_trywait SIGFE
+sem_unlink SIGFE
 sem_wait SIGFE
 semctl SIGFE
 semget SIGFE