141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
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threading.c
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Ruamoko threading support
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Copyright (C) 2020 Bill Currie <bill@taniwha.org>
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Copyright (C) 2021 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2020/03/01
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <sys/time.h>
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#include <errno.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "QF/dstring.h"
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#include "ruamoko/qwaq/qwaq.h"
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#include "ruamoko/qwaq/threading.h"
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#define always_inline inline __attribute__((__always_inline__))
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int
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qwaq_pipe_acquire_string (qwaq_pipe_t *pipe)
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{
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int string_id = -1;
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pthread_mutex_lock (&pipe->string_id_cond.mut);
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while (RB_DATA_AVAILABLE (pipe->string_ids) < 1) {
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pthread_cond_wait (&pipe->string_id_cond.rcond,
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&pipe->string_id_cond.mut);
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}
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RB_READ_DATA (pipe->string_ids, &string_id, 1);
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pthread_cond_broadcast (&pipe->string_id_cond.wcond);
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pthread_mutex_unlock (&pipe->string_id_cond.mut);
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return string_id;
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}
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void
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qwaq_pipe_release_string (qwaq_pipe_t *pipe, int string_id)
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{
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pthread_mutex_lock (&pipe->string_id_cond.mut);
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while (RB_SPACE_AVAILABLE (pipe->string_ids) < 1) {
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pthread_cond_wait (&pipe->string_id_cond.wcond,
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&pipe->string_id_cond.mut);
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}
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RB_WRITE_DATA (pipe->string_ids, &string_id, 1);
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pthread_cond_broadcast (&pipe->string_id_cond.rcond);
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pthread_mutex_unlock (&pipe->string_id_cond.mut);
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}
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void
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qwaq_pipe_submit (qwaq_pipe_t *pipe, const int *cmd, unsigned len)
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{
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pthread_mutex_lock (&pipe->pipe_cond.mut);
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while (RB_SPACE_AVAILABLE (pipe->pipe) < len) {
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pthread_cond_wait (&pipe->pipe_cond.wcond,
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&pipe->pipe_cond.mut);
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}
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RB_WRITE_DATA (pipe->pipe, cmd, len);
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pthread_cond_broadcast (&pipe->pipe_cond.rcond);
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pthread_mutex_unlock (&pipe->pipe_cond.mut);
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}
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void
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qwaq_pipe_receive (qwaq_pipe_t *pipe, int *result, int cmd, unsigned len)
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{
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//Sys_Printf ("qwaq_wait_result: %d %d\n", cmd, len);
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pthread_mutex_lock (&pipe->pipe_cond.mut);
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while (RB_DATA_AVAILABLE (pipe->pipe) < len
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|| *RB_PEEK_DATA (pipe->pipe, 0) != cmd) {
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pthread_cond_wait (&pipe->pipe_cond.rcond,
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&pipe->pipe_cond.mut);
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}
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RB_READ_DATA (pipe->pipe, result, len);
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pthread_cond_broadcast (&pipe->pipe_cond.wcond);
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pthread_mutex_unlock (&pipe->pipe_cond.mut);
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//Sys_Printf ("qwaq_wait_result exit: %d %d\n", cmd, len);
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}
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void
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qwaq_init_timeout (struct timespec *timeout, int64_t time)
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{
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#define SEC 1000000000L
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struct timeval now;
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gettimeofday(&now, 0);
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timeout->tv_sec = now.tv_sec;
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timeout->tv_nsec = now.tv_usec * 1000L + time;
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if (timeout->tv_nsec >= SEC) {
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timeout->tv_sec += timeout->tv_nsec / SEC;
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timeout->tv_nsec %= SEC;
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}
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}
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void
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qwaq_init_cond (rwcond_t *cond)
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{
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pthread_cond_init (&cond->rcond, 0);
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pthread_cond_init (&cond->wcond, 0);
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pthread_mutex_init (&cond->mut, 0);
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}
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void
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qwaq_init_pipe (qwaq_pipe_t *pipe)
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{
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qwaq_init_cond (&pipe->pipe_cond);
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qwaq_init_cond (&pipe->string_id_cond);
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for (int i = 0; i < STRING_ID_QUEUE_SIZE - 1; i++) {
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RB_WRITE_DATA (pipe->string_ids, &i, 1);
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pipe->strings[i].mem = &dstring_default_mem;
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}
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}
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