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- /* Copyright (C) 1998, 1999 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: gp_nsync.c,v 1.2 2000/09/19 19:00:24 lpd Exp $ */
- /* Dummy thread / semaphore / monitor implementation */
- #include "std.h"
- #include "gserror.h"
- #include "gserrors.h"
- #include "gpsync.h"
-
- /* ------- Synchronization primitives -------- */
-
- /* Semaphores */
-
- uint
- gp_semaphore_sizeof(void)
- {
- return sizeof(gp_semaphore);
- }
-
- int
- gp_semaphore_open(gp_semaphore * sema)
- {
- if (sema)
- *(int *)sema = 0;
- return 0;
- }
-
- int
- gp_semaphore_close(gp_semaphore * sema)
- {
- return 0;
- }
-
- int
- gp_semaphore_wait(gp_semaphore * sema)
- {
- if (*(int *)sema == 0)
- return_error(gs_error_unknownerror); /* no real waiting */
- --(*(int *)sema);
- return 0;
- }
-
- int
- gp_semaphore_signal(gp_semaphore * sema)
- {
- ++(*(int *)sema);
- return 0;
- }
-
- /* Monitors */
-
- uint
- gp_monitor_sizeof(void)
- {
- return sizeof(gp_monitor);
- }
-
- int
- gp_monitor_open(gp_monitor * mon)
- {
- if (mon)
- mon->dummy_ = 0;
- return 0;
- }
-
- int
- gp_monitor_close(gp_monitor * mon)
- {
- return 0;
- }
-
- int
- gp_monitor_enter(gp_monitor * mon)
- {
- if (mon->dummy_ != 0)
- return_error(gs_error_unknownerror);
- mon->dummy_ = mon;
- return 0;
- }
-
- int
- gp_monitor_leave(gp_monitor * mon)
- {
- if (mon->dummy_ != mon)
- return_error(gs_error_unknownerror);
- mon->dummy_ = 0;
- return 0;
- }
-
- /* Thread creation */
-
- int
- gp_create_thread(gp_thread_creation_callback_t proc, void *proc_data)
- {
- return_error(gs_error_unknownerror);
- }
-