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main-loop: create main-loop.c

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-09-13 10:30:52 +02:00
parent 44a9b356ad
commit d3b12f5dec
11 changed files with 523 additions and 454 deletions
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123
os-win32.c
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@ -48,129 +48,6 @@ int setenv(const char *name, const char *value, int overwrite)
return result;
}
/***********************************************************/
/* Polling handling */
typedef struct PollingEntry {
PollingFunc *func;
void *opaque;
struct PollingEntry *next;
} PollingEntry;
static PollingEntry *first_polling_entry;
int qemu_add_polling_cb(PollingFunc *func, void *opaque)
{
PollingEntry **ppe, *pe;
pe = g_malloc0(sizeof(PollingEntry));
pe->func = func;
pe->opaque = opaque;
for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next);
*ppe = pe;
return 0;
}
void qemu_del_polling_cb(PollingFunc *func, void *opaque)
{
PollingEntry **ppe, *pe;
for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) {
pe = *ppe;
if (pe->func == func && pe->opaque == opaque) {
*ppe = pe->next;
g_free(pe);
break;
}
}
}
/***********************************************************/
/* Wait objects support */
typedef struct WaitObjects {
int num;
HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
void *opaque[MAXIMUM_WAIT_OBJECTS + 1];
} WaitObjects;
static WaitObjects wait_objects = {0};
int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
{
WaitObjects *w = &wait_objects;
if (w->num >= MAXIMUM_WAIT_OBJECTS)
return -1;
w->events[w->num] = handle;
w->func[w->num] = func;
w->opaque[w->num] = opaque;
w->num++;
return 0;
}
void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
{
int i, found;
WaitObjects *w = &wait_objects;
found = 0;
for (i = 0; i < w->num; i++) {
if (w->events[i] == handle)
found = 1;
if (found) {
w->events[i] = w->events[i + 1];
w->func[i] = w->func[i + 1];
w->opaque[i] = w->opaque[i + 1];
}
}
if (found)
w->num--;
}
void os_host_main_loop_wait(int *timeout)
{
int ret, ret2, i;
PollingEntry *pe;
/* XXX: need to suppress polling by better using win32 events */
ret = 0;
for(pe = first_polling_entry; pe != NULL; pe = pe->next) {
ret |= pe->func(pe->opaque);
}
if (ret == 0) {
int err;
WaitObjects *w = &wait_objects;
qemu_mutex_unlock_iothread();
ret = WaitForMultipleObjects(w->num, w->events, FALSE, *timeout);
qemu_mutex_lock_iothread();
if (WAIT_OBJECT_0 + 0 <= ret && ret <= WAIT_OBJECT_0 + w->num - 1) {
if (w->func[ret - WAIT_OBJECT_0])
w->func[ret - WAIT_OBJECT_0](w->opaque[ret - WAIT_OBJECT_0]);
/* Check for additional signaled events */
for(i = (ret - WAIT_OBJECT_0 + 1); i < w->num; i++) {
/* Check if event is signaled */
ret2 = WaitForSingleObject(w->events[i], 0);
if(ret2 == WAIT_OBJECT_0) {
if (w->func[i])
w->func[i](w->opaque[i]);
} else if (ret2 == WAIT_TIMEOUT) {
} else {
err = GetLastError();
fprintf(stderr, "WaitForSingleObject error %d %d\n", i, err);
}
}
} else if (ret == WAIT_TIMEOUT) {
} else {
err = GetLastError();
fprintf(stderr, "WaitForMultipleObjects error %d %d\n", ret, err);
}
}
*timeout = 0;
}
static BOOL WINAPI qemu_ctrl_handler(DWORD type)
{
exit(STATUS_CONTROL_C_EXIT);