github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-01 17:06:51 +00:00
Code Issues Projects Releases Wiki Activity

dm: provide timer callback handlers the number of expirations

Browse Source 
It is possible for multiple timeouts to occur in one mevent epoll
iteration. Providing the number of timer expirations to the timer
callback handlers can be useful. E.g., this could improve emulation of
timing-sensitive hardware components.

Tracked-On: #2319
Signed-off-by: Peter Fang <peter.fang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Peter Fang
2019-01-10 19:03:30 -08:00
committed by wenlingz
parent 0f7535fdbe
commit 3fe4c3f2a8
5 changed files with 24 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
devicemodel/core/timer.c
View File

@@ -6,6 +6,8 @@
#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <sys/timerfd.h>
#include "vmmapi.h"
@@ -28,8 +30,9 @@ timer_handler(int fd __attribute__((unused)),
void *arg)
{
struct acrn_timer *timer = arg;
uint64_t buf;
int32_t size;
uint64_t nexp;
ssize_t size;
void (*cb)(void *, uint64_t);
if (timer == NULL) {
return;
@@ -39,19 +42,25 @@ timer_handler(int fd __attribute__((unused)),
* Here is a temporary solution, the processing could be moved to
* mevent.c once EVF_TIMER is supported.
*/
size = read(timer->fd, &buf, sizeof(buf));
if (size < 1) {
fprintf(stderr, "acrn_timer read timerfd error!");
size = read(timer->fd, &nexp, sizeof(nexp));
if (size < 0) {
if (errno != EAGAIN) {
perror("acrn_timer read timerfd error");
}
return;
}
if (timer->callback != NULL) {
(*timer->callback)(timer->callback_param);
assert(size > 0 && nexp > 0);
if ((cb = timer->callback) != NULL) {
(*cb)(timer->callback_param, nexp);
}
}
int32_t
acrn_timer_init(struct acrn_timer *timer, void (*cb)(void *), void *param)
acrn_timer_init(struct acrn_timer *timer, void (*cb)(void *, uint64_t),
void *param)
{
if ((timer == NULL) || (cb == NULL)) {
return -1;