* 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.

winsup/cygwin/pthread.cc

@@ -1,6 +1,6 @@
 /* pthread.cc: posix pthread interface for Cygwin
 
-   Copyright 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
+   Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007 Red Hat, Inc.
 
    Originally written by Marco Fuykschot <marco@ddi.nl>
 
@@ -164,60 +164,6 @@ sem_destroy (sem_t * sem)
   return semaphore::destroy (sem);
 }
 
-/* Mangle semaphore name to follow windows naming rules.  Prepend "Global\"
-   if running on terminal service aware machine.  Substitute invalid backslash
-   by forward slash characters, hoping not to collide. */
-static bool
-mangle_sem_name (char *mangled, const char *name)
-{
-  myfault efault;
-  if (efault.faulted (EFAULT))
-    return false;
-  if (!*name)
-    {
-      set_errno (ENOENT);
-      return false;
-    }
-  size_t len = strlen (cygheap->shared_prefix);
-  if (strlen (name) >= CYG_MAX_PATH - len)
-    {
-      set_errno (EINVAL);
-      return false;
-    }
-  strcpy (mangled, cygheap->shared_prefix);
-  char *d = mangled + len;
-  const char *s = name;
-  while (*s)
-    *d++ = (*s == '\\') ? '/' : *s++;
-  *d = '\0';
-  return true;
-}
-
-sem_t *
-sem_open (const char *name, int oflag, ...)
-{
-  mode_t mode = 0;
-  unsigned int value = 0;
-  if (oflag & O_CREAT)
-    {
-      va_list ap;
-      va_start (ap, oflag);
-      mode = va_arg (ap, mode_t);
-      value = va_arg (ap, unsigned int);
-      va_end (ap);
-    }
-  char mangled_name[CYG_MAX_PATH];
-  if (!mangle_sem_name (mangled_name, name))
-    return NULL;
-  return semaphore::open (mangled_name, oflag, mode, value);
-}
-
-int
-sem_close (sem_t * sem)
-{
-  return semaphore::destroy (sem);
-}
-
 int
 sem_wait (sem_t * sem)
 {