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[Qemu-devel] [PATCH] Use SIGALRM even for timers delivered over a fd
From: |
Anders Melchiorsen |
Subject: |
[Qemu-devel] [PATCH] Use SIGALRM even for timers delivered over a fd |
Date: |
Sun, 20 Apr 2008 11:20:28 +0200 |
This ensures that all timers use the same signal, no
matter how the underlying timer is implemented. It also
frees up SIGIO for real I/O events.
The patch is only relevant for Linux, hpet and rtc timers.
Signed-off-by: Anders Melchiorsen <address@hidden>
diff --git a/vl.c b/vl.c
index 78486cf..ad4f6ef 100644
--- a/vl.c
+++ b/vl.c
@@ -1241,7 +1241,7 @@ static uint64_t qemu_next_deadline(void)
#define RTC_FREQ 1024
-static void enable_sigio_timer(int fd)
+static void enable_sigalrm(int fd)
{
struct sigaction act;
@@ -1250,8 +1250,9 @@ static void enable_sigio_timer(int fd)
act.sa_flags = 0;
act.sa_handler = host_alarm_handler;
- sigaction(SIGIO, &act, NULL);
+ sigaction(SIGALRM, &act, NULL);
fcntl(fd, F_SETFL, O_ASYNC);
+ fcntl(fd, F_SETSIG, SIGALRM);
fcntl(fd, F_SETOWN, getpid());
}
@@ -1288,7 +1289,7 @@ static int hpet_start_timer(struct qemu_alarm_timer *t)
if (r < 0)
goto fail;
- enable_sigio_timer(fd);
+ enable_sigalrm(fd);
t->priv = (void *)(long)fd;
return 0;
@@ -1326,7 +1327,7 @@ static int rtc_start_timer(struct qemu_alarm_timer *t)
return -1;
}
- enable_sigio_timer(rtc_fd);
+ enable_sigalrm(rtc_fd);
t->priv = (void *)(long)rtc_fd;
--
1.5.2.5