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- /* Copyright (C) 1998 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
-
- /*$Id: gxsync.h,v 1.2 2000/09/19 19:00:40 lpd Exp $ */
- /* Interface to synchronization primitives */
-
- /* Initial version 2/1/98 by John Desrosiers (soho@crl.com) */
-
- #if !defined(gxsync_INCLUDED)
- # define gxsync_INCLUDED
-
- #include "gpsync.h"
- #include "gsmemory.h"
-
- /* This module abstracts the platform-specific synchronization primitives. */
- /* Since these routines will see heavy use, performance is important. */
-
- /* ----- Semaphore interface ----- */
- /* These have the usual queued, counting semaphore semantics: at init time, */
- /* the event count is set to 0 ('wait' will wait until 1st signal). */
- typedef struct gx_semaphore_s {
- gs_memory_t *memory; /* allocator to free memory */
- gp_semaphore native; /* MUST BE LAST last since length is undef'd */
- /* platform-dep impl, len is gp_semaphore_sizeof() */
- } gx_semaphore_t;
-
- gx_semaphore_t * /* returns a new semaphore, 0 if error */
- gx_semaphore_alloc(P1(
- gs_memory_t * memory /* memory allocator to use */
- ));
- void
- gx_semaphore_free(P1(
- gx_semaphore_t * sema /* semaphore to delete */
- ));
-
- #define gx_semaphore_wait(sema) gp_semaphore_wait(&(sema)->native)
- #define gx_semaphore_signal(sema) gp_semaphore_signal(&(sema)->native)
-
-
- /* ----- Monitor interface ----- */
- /* These have the usual monitor semantics: at init time, */
- /* the event count is set to 1 (1st 'enter' succeeds immediately). */
- typedef struct gx_monitor_s {
- gs_memory_t *memory; /* allocator to free memory */
- gp_monitor native; /* platform-dep impl, len is gp_monitor_sizeof() */
- } gx_monitor_t;
-
- gx_monitor_t * /* returns a new monitor, 0 if error */
- gx_monitor_alloc(P1(
- gs_memory_t * memory /* memory allocator to use */
- ));
- void
- gx_monitor_free(P1(
- gx_monitor_t * mon /* monitor to delete */
- ));
-
- #define gx_monitor_enter(sema) gp_monitor_enter(&(sema)->native)
- #define gx_monitor_leave(sema) gp_monitor_leave(&(sema)->native)
-
- #endif /* !defined(gxsync_INCLUDED) */
-