119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
#include "common.h"
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#include <ddekit/condvar.h>
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#include <ddekit/lock.h>
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#include <ddekit/memory.h>
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#ifdef DDEBUG_LEVEL_CONDVAR
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#undef DDEBUG
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#define DDEBUG DDEBUG_LEVEL_CONDVAR
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#endif
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#include "debug.h"
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#include "util.h"
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#include "thread.h"
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struct ddekit_condvar {
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ddekit_thread_t * wait_queue;
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};
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/*****************************************************************************/
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/* ddekit_condvar_init */
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/*****************************************************************************/
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ddekit_condvar_t * ddekit_condvar_init(void) {
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ddekit_condvar_t *cv;
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cv = (ddekit_condvar_t *) ddekit_simple_malloc(sizeof(ddekit_condvar_t));
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DDEBUG_MSG_VERBOSE("cv: %p", cv);
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return cv;
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}
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/*****************************************************************************/
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/* ddekit_condvar_deinit */
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/*****************************************************************************/
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void ddekit_condvar_deinit(ddekit_condvar_t *cvp) {
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DDEBUG_MSG_VERBOSE("cv: %p", cvp);
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ddekit_simple_free(cvp);
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}
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/*****************************************************************************/
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/* ddekit_condvar_wait */
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/*****************************************************************************/
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void ddekit_condvar_wait(ddekit_condvar_t *cv, ddekit_lock_t *mp) {
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DDEBUG_MSG_VERBOSE("wait cv: %p, thread id: %d, name: %s",
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cv, ddekit_thread_myself()->id, ddekit_thread_myself()->name);
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ddekit_lock_unlock(mp);
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if(cv->wait_queue == NULL) {
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cv->wait_queue = ddekit_thread_myself();
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} else {
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ddekit_thread_t *pos = cv->wait_queue;
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while(pos->next != NULL) {
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pos = pos->next;
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}
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pos->next = ddekit_thread_myself();
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}
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_ddekit_thread_schedule();
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DDEBUG_MSG_VERBOSE("wakeup cv: %p, thread id: %d, name: %s",
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cv, ddekit_thread_myself()->id, ddekit_thread_myself()->name);
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ddekit_lock_lock(mp);
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}
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/*****************************************************************************/
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/* ddekit_condvar_wait_timed */
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/*****************************************************************************/
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int ddekit_condvar_wait_timed
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(ddekit_condvar_t *cvp, ddekit_lock_t *mp, int timo)
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{
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/*
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* Only used by ddefbsd, so not implemented
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*/
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WARN_UNIMPL;
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return 0;
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}
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/*****************************************************************************/
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/* ddekit_condvar_signal */
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/*****************************************************************************/
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void ddekit_condvar_signal(ddekit_condvar_t *cv)
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{
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DDEBUG_MSG_VERBOSE("cv: %p", cv);
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if(cv->wait_queue) {
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ddekit_thread_t *th = cv->wait_queue;
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cv->wait_queue = th->next;
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th->next = NULL;
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_ddekit_thread_enqueue(th);
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DDEBUG_MSG_VERBOSE("waking up cv: %p, thread id: %d, name: %s",
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cv, th->id, th->name);
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}
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ddekit_thread_schedule();
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}
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/*****************************************************************************/
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/* ddekit_condvar_broadcast */
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/*****************************************************************************/
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void ddekit_condvar_broadcast(ddekit_condvar_t *cv) {
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DDEBUG_MSG_VERBOSE("cv: %p", cv);
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while (cv->wait_queue) {
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ddekit_thread_t *th = cv->wait_queue;
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cv->wait_queue = th->next;
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th->next = NULL;
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_ddekit_thread_enqueue(th);
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DDEBUG_MSG_VERBOSE("waking up cv: %p, thread id: %d, name: %s",
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cv, th->id, th->name);
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}
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ddekit_thread_schedule();
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}
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