qemu/libcacard/event.c
Michael Tokarev fd25c0e6dd libcacard: replace qemu thread primitives with glib ones
Replace QemuMutex with GMutex and QemuCond with GCond
(with corresponding function changes), to make libcacard
independent of qemu internal functions.

After this step, none of libcacard internals use any
qemu-provided symbols.  Maybe it's a good idea to
stop including qemu-common.h internally too.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Alon Levy <alevy@redhat.com>
Tested-by: Alon Levy <alevy@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-10 07:44:01 +02:00

104 lines
2.1 KiB
C

/*
* event queue implementation.
*
* This code is licensed under the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu-common.h"
#include "vcard.h"
#include "vreader.h"
#include "vevent.h"
VEvent *
vevent_new(VEventType type, VReader *reader, VCard *card)
{
VEvent *new_vevent;
new_vevent = g_new(VEvent, 1);
new_vevent->next = NULL;
new_vevent->type = type;
new_vevent->reader = vreader_reference(reader);
new_vevent->card = vcard_reference(card);
return new_vevent;
}
void
vevent_delete(VEvent *vevent)
{
if (vevent == NULL) {
return;
}
vreader_free(vevent->reader);
vcard_free(vevent->card);
g_free(vevent);
}
/*
* VEvent queue management
*/
static VEvent *vevent_queue_head;
static VEvent *vevent_queue_tail;
static CompatGMutex vevent_queue_lock;
static CompatGCond vevent_queue_condition;
void vevent_queue_init(void)
{
vevent_queue_head = vevent_queue_tail = NULL;
}
void
vevent_queue_vevent(VEvent *vevent)
{
vevent->next = NULL;
g_mutex_lock(&vevent_queue_lock);
if (vevent_queue_head) {
assert(vevent_queue_tail);
vevent_queue_tail->next = vevent;
} else {
vevent_queue_head = vevent;
}
vevent_queue_tail = vevent;
g_cond_signal(&vevent_queue_condition);
g_mutex_unlock(&vevent_queue_lock);
}
/* must have lock */
static VEvent *
vevent_dequeue_vevent(void)
{
VEvent *vevent = NULL;
if (vevent_queue_head) {
vevent = vevent_queue_head;
vevent_queue_head = vevent->next;
vevent->next = NULL;
}
return vevent;
}
VEvent *vevent_wait_next_vevent(void)
{
VEvent *vevent;
g_mutex_lock(&vevent_queue_lock);
while ((vevent = vevent_dequeue_vevent()) == NULL) {
g_cond_wait(&vevent_queue_condition, &vevent_queue_lock);
}
g_mutex_unlock(&vevent_queue_lock);
return vevent;
}
VEvent *vevent_get_next_vevent(void)
{
VEvent *vevent;
g_mutex_lock(&vevent_queue_lock);
vevent = vevent_dequeue_vevent();
g_mutex_unlock(&vevent_queue_lock);
return vevent;
}