Drop old SetResourceLock stuff in favor of mutos.

	* dcrt0.cc (_reslock): Remove.
	(__cygwin_user_data): Accommodate removal of resourcelocks member.
	(dll_crt0_0): Don't initialize resourcelocks.
	* exceptions.cc (_cygtls::signal_exit): Drop resourcelocks handling.
	* mmap.cc (mmap_guard): New muto.
	(LIST_LOCK): Define.
	(LIST_UNLOCK): Define.
	(mmap_list::search_record): Remove.
	(mmap_list::try_map): Include code for anonymous case from
	mmap_list::search_record.
	(mmap_is_attached_or_noreserve): Access bookkeeping lists in a thread
	safe way.
	(mmap64): Replace SetResourceLock/ReleaseResourceLock by
	LIST_LOCK/LIST_UNLOCK.  Lock at the latest possible point.
	(munmap): Replace SetResourceLock/ReleaseResourceLock by
	LIST_LOCK/LIST_UNLOCK.
	(msync): Ditto.
	(mprotect): Ditto.
	* thread.cc (ResourceLocks::Lock): Remove.
	(SetResourceLock): Remove.
	(ReleaseResourceLock): Remove.
	(ResourceLocks::Init): Remove.
	(ResourceLocks::Delete): Remove.
	* thread.h (SetResourceLock): Drop declaration.
	(ReleaseResourceLock): Ditto.
	(class ResourceLocks): Drop definition.
	* include/sys/cygwin.h (class ResourceLocks): Drop forward declaration.
	(struct per_process): Replace resourcelocks with additional unused2
	element.
	(per_process_overwrite): Accommodate above change.

1 files changed, 2 insertions, 5 deletions

diff --git a/winsup/cygwin/include/sys/cygwin.h b/winsup/cygwin/include/sys/cygwin.h
index 7cc36c434..7fe4a1377 100644
--- a/winsup/cygwin/include/sys/cygwin.h
+++ b/winsup/cygwin/include/sys/cygwin.h
@@ -140,7 +140,6 @@ extern HANDLE cygwin_logon_user (const struct passwd *, const char *);
 */
 
 #ifdef __cplusplus
-class ResourceLocks;
 class MTinterface;
 #endif
 
@@ -198,18 +197,16 @@ struct per_process
   DWORD api_minor;		/*  linked with */
   /* For future expansion, so apps won't have to be relinked if we
      add an item. */
-  DWORD unused2[5];
+  DWORD unused2[6];
 
 #if defined (__INSIDE_CYGWIN__) && defined (__cplusplus)
-  ResourceLocks *resourcelocks;
   MTinterface *threadinterface;
 #else
-  void *resourcelocks;
   void *threadinterface;
 #endif
   struct _reent *impure_ptr;
 };
-#define per_process_overwrite ((unsigned) &(((struct per_process *) NULL)->resourcelocks))
+#define per_process_overwrite ((unsigned) &(((struct per_process *) NULL)->threadinterface))
 
 extern void cygwin_premain0 (int argc, char **argv, struct per_process *);
 extern void cygwin_premain1 (int argc, char **argv, struct per_process *);