From 401bc051d7706e33046d79539465b8326383a1b2 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Tue, 5 Sep 2017 13:19:32 +0100 Subject: util/qemu-thread-posix.c: Replace OS ifdefs with CONFIG_HAVE_SEM_TIMEDWAIT In qemu-thread-posix.c we have two implementations of the various qemu_sem_* functions, one of which uses native POSIX sem_* and the other of which emulates them with pthread conditions. This is necessary because not all our host OSes support sem_timedwait(). Instead of a hard-coded list of OSes which don't implement sem_timedwait(), which gets out of date, make configure test for the presence of the function and set a new CONFIG_HAVE_SEM_TIMEDWAIT appropriately. In particular, newer NetBSDs have sem_timedwait(), so this commit will switch them over to using it. OSX still does not have an implementation. Signed-off-by: Peter Maydell Reviewed-by: Kamil Rytarowski Reviewed-by: Eric Blake Signed-off-by: Michael Tokarev --- util/qemu-thread-posix.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'util') diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c index 4e95d272dc..7306475899 100644 --- a/util/qemu-thread-posix.c +++ b/util/qemu-thread-posix.c @@ -168,7 +168,7 @@ void qemu_sem_init(QemuSemaphore *sem, int init) { int rc; -#if defined(__APPLE__) || defined(__NetBSD__) +#ifndef CONFIG_SEM_TIMEDWAIT rc = pthread_mutex_init(&sem->lock, NULL); if (rc != 0) { error_exit(rc, __func__); @@ -196,7 +196,7 @@ void qemu_sem_destroy(QemuSemaphore *sem) assert(sem->initialized); sem->initialized = false; -#if defined(__APPLE__) || defined(__NetBSD__) +#ifndef CONFIG_SEM_TIMEDWAIT rc = pthread_cond_destroy(&sem->cond); if (rc < 0) { error_exit(rc, __func__); @@ -218,7 +218,7 @@ void qemu_sem_post(QemuSemaphore *sem) int rc; assert(sem->initialized); -#if defined(__APPLE__) || defined(__NetBSD__) +#ifndef CONFIG_SEM_TIMEDWAIT pthread_mutex_lock(&sem->lock); if (sem->count == UINT_MAX) { rc = EINVAL; @@ -256,7 +256,7 @@ int qemu_sem_timedwait(QemuSemaphore *sem, int ms) struct timespec ts; assert(sem->initialized); -#if defined(__APPLE__) || defined(__NetBSD__) +#ifndef CONFIG_SEM_TIMEDWAIT rc = 0; compute_abs_deadline(&ts, ms); pthread_mutex_lock(&sem->lock); @@ -304,7 +304,7 @@ void qemu_sem_wait(QemuSemaphore *sem) int rc; assert(sem->initialized); -#if defined(__APPLE__) || defined(__NetBSD__) +#ifndef CONFIG_SEM_TIMEDWAIT pthread_mutex_lock(&sem->lock); while (sem->count == 0) { rc = pthread_cond_wait(&sem->cond, &sem->lock); -- cgit v1.2.3-55-g7522