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