diff options
| -rwxr-xr-x | configure | 19 | ||||
| -rw-r--r-- | include/qemu/timer.h | 12 | ||||
| -rw-r--r-- | qemu-timer.c | 24 |
3 files changed, 55 insertions, 0 deletions
@@ -2818,6 +2818,22 @@ if compile_prog "" "" ; then dup3=yes fi +# check for ppoll support +ppoll=no +cat > $TMPC << EOF +#include <poll.h> + +int main(void) +{ + struct pollfd pfd = { .fd = 0, .events = 0, .revents = 0 }; + ppoll(&pfd, 1, 0, 0); + return 0; +} +EOF +if compile_prog "" "" ; then + ppoll=yes +fi + # check for epoll support epoll=no cat > $TMPC << EOF @@ -3814,6 +3830,9 @@ fi if test "$dup3" = "yes" ; then echo "CONFIG_DUP3=y" >> $config_host_mak fi +if test "$ppoll" = "yes" ; then + echo "CONFIG_PPOLL=y" >> $config_host_mak +fi if test "$epoll" = "yes" ; then echo "CONFIG_EPOLL=y" >> $config_host_mak fi diff --git a/include/qemu/timer.h b/include/qemu/timer.h index e0a51a1486..e4a6479137 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -63,6 +63,18 @@ int64_t qemu_clock_deadline_ns(QEMUClock *clock); */ int qemu_timeout_ns_to_ms(int64_t ns); +/** + * qemu_poll_ns: + * @fds: Array of file descriptors + * @nfds: number of file descriptors + * @timeout: timeout in nanoseconds + * + * Perform a poll like g_poll but with a timeout in nanoseconds. + * See g_poll documentation for further details. + * + * Returns: number of fds ready + */ +int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout); void qemu_clock_enable(QEMUClock *clock, bool enabled); void qemu_clock_warp(QEMUClock *clock); diff --git a/qemu-timer.c b/qemu-timer.c index be29adf9eb..120d58fb2a 100644 --- a/qemu-timer.c +++ b/qemu-timer.c @@ -37,6 +37,10 @@ #include <mmsystem.h> #endif +#ifdef CONFIG_PPOLL +#include <poll.h> +#endif + /***********************************************************/ /* timers */ @@ -323,6 +327,26 @@ int qemu_timeout_ns_to_ms(int64_t ns) } +/* qemu implementation of g_poll which uses a nanosecond timeout but is + * otherwise identical to g_poll + */ +int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout) +{ +#ifdef CONFIG_PPOLL + if (timeout < 0) { + return ppoll((struct pollfd *)fds, nfds, NULL, NULL); + } else { + struct timespec ts; + ts.tv_sec = timeout / 1000000000LL; + ts.tv_nsec = timeout % 1000000000LL; + return ppoll((struct pollfd *)fds, nfds, &ts, NULL); + } +#else + return g_poll(fds, nfds, qemu_timeout_ns_to_ms(timeout)); +#endif +} + + QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale, QEMUTimerCB *cb, void *opaque) { |