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authorJes Sorensen <Jes.Sorensen@redhat.com>2010-10-26 10:39:22 +0200
committerBlue Swirl <blauwirbel@gmail.com>2010-10-30 08:02:37 +0000
commit949d31e665e9847b2a8f24a916abd96e79353535 (patch)
tree091a23bf1fa7fbe0c8cb205580b061c63f867d31 /os-posix.c
parent70e72ce45e1f06415b5ec28439c2a87a72e5aad3 (diff)
downloadqemu-arm-949d31e665e9847b2a8f24a916abd96e79353535.tar.gz
We only support eventfd under POSIX, move qemu_eventfd() to os-posix.c
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'os-posix.c')
-rw-r--r--os-posix.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/os-posix.c b/os-posix.c
index 6321e990c5..612b641737 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -43,6 +43,10 @@
#include <sys/prctl.h>
#endif
+#ifdef CONFIG_EVENTFD
+#include <sys/eventfd.h>
+#endif
+
static struct passwd *user_pwd;
static const char *chroot_dir;
static int daemonize;
@@ -329,3 +333,31 @@ void os_set_line_buffering(void)
{
setvbuf(stdout, NULL, _IOLBF, 0);
}
+
+/*
+ * Creates an eventfd that looks like a pipe and has EFD_CLOEXEC set.
+ */
+int qemu_eventfd(int fds[2])
+{
+#ifdef CONFIG_EVENTFD
+ int ret;
+
+ ret = eventfd(0, 0);
+ if (ret >= 0) {
+ fds[0] = ret;
+ qemu_set_cloexec(ret);
+ if ((fds[1] = dup(ret)) == -1) {
+ close(ret);
+ return -1;
+ }
+ qemu_set_cloexec(fds[1]);
+ return 0;
+ }
+
+ if (errno != ENOSYS) {
+ return -1;
+ }
+#endif
+
+ return qemu_pipe(fds);
+}