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Main loop fixes/cleanup 

Tidy up win32 main loop bits, allow timeout >= 1s, and force timeout to 0 if
there is a pending bottom half.



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5577 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-10-31 18:07:17 +00:00
parent 80d3580b29
commit 56f3a5d01e
2 changed files with 48 additions and 18 deletions
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2
sysemu.h
View File

@ -58,6 +58,7 @@ int qemu_savevm_state_complete(QEMUFile *f);
int qemu_savevm_state(QEMUFile *f);
int qemu_loadvm_state(QEMUFile *f);
#ifdef _WIN32
/* Polling handling */
/* return TRUE if no sleep should be done afterwards */
@ -66,7 +67,6 @@ typedef int PollingFunc(void *opaque);
int qemu_add_polling_cb(PollingFunc *func, void *opaque);
void qemu_del_polling_cb(PollingFunc *func, void *opaque);
#ifdef _WIN32
/* Wait objects handling */
typedef void WaitObjectFunc(void *opaque);

64
vl.c
View File

@ -6140,6 +6140,7 @@ int qemu_set_fd_handler(int fd,
return qemu_set_fd_handler2(fd, NULL, fd_read, fd_write, opaque);
}
#ifdef _WIN32
/***********************************************************/
/* Polling handling */
@ -6177,7 +6178,6 @@ void qemu_del_polling_cb(PollingFunc *func, void *opaque)
}
}
#ifdef _WIN32
/***********************************************************/
/* Wait objects support */
typedef struct WaitObjects {
@ -7688,6 +7688,26 @@ void qemu_bh_delete(QEMUBH *bh)
bh->deleted = 1;
}
static void qemu_bh_update_timeout(int *timeout)
{
QEMUBH *bh;
for (bh = first_bh; bh; bh = bh->next) {
if (!bh->deleted && bh->scheduled) {
if (bh->idle) {
/* idle bottom halves will be polled at least
* every 10ms */
*timeout = MIN(10, *timeout);
} else {
/* non-idle bottom halves will be executed
* immediately */
*timeout = 0;
break;
}
}
}
}
/***********************************************************/
/* machine registration */
@ -7890,15 +7910,10 @@ void qemu_system_powerdown_request(void)
cpu_interrupt(cpu_single_env, CPU_INTERRUPT_EXIT);
}
void main_loop_wait(int timeout)
{
IOHandlerRecord *ioh;
fd_set rfds, wfds, xfds;
int ret, nfds;
#ifdef _WIN32
int ret2, i;
#endif
struct timeval tv;
void host_main_loop_wait(int *timeout)
{
int ret, ret2, i;
PollingEntry *pe;
@ -7907,12 +7922,11 @@ void main_loop_wait(int timeout)
for(pe = first_polling_entry; pe != NULL; pe = pe->next) {
ret |= pe->func(pe->opaque);
}
#ifdef _WIN32
if (ret == 0) {
int err;
WaitObjects *w = &wait_objects;
ret = WaitForMultipleObjects(w->num, w->events, FALSE, timeout);
ret = WaitForMultipleObjects(w->num, w->events, FALSE, *timeout);
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]);
@ -7937,7 +7951,26 @@ void main_loop_wait(int timeout)
fprintf(stderr, "WaitForMultipleObjects error %d %d\n", ret, err);
}
}
*timeout = 0;
}
#else
void host_main_loop_wait(int *timeout)
{
}
#endif
void main_loop_wait(int timeout)
{
IOHandlerRecord *ioh;
fd_set rfds, wfds, xfds;
int ret, nfds;
struct timeval tv;
qemu_bh_update_timeout(&timeout);
host_main_loop_wait(&timeout);
/* poll any events */
/* XXX: separate device handlers from system ones */
nfds = -1;
@ -7961,12 +7994,9 @@ void main_loop_wait(int timeout)
}
}
tv.tv_sec = 0;
#ifdef _WIN32
tv.tv_usec = 0;
#else
tv.tv_usec = timeout * 1000;
#endif
tv.tv_sec = timeout / 1000;
tv.tv_usec = (timeout % 1000) * 1000;
#if defined(CONFIG_SLIRP)
if (slirp_inited) {
slirp_select_fill(&nfds, &rfds, &wfds, &xfds);