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threads: update for late C11 changes

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C11 threads were changed to use struct timespec instead of xtime, and
thrd_sleep got a second argument.

See http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1554.htm and
http://en.cppreference.com/w/c/thread/{thrd_sleep,cnd_timedwait,mtx_timedlock}

Note that cnd_timedwait is spec'd to be relative to TIME_UTC / CLOCK_REALTIME.

v2: Fix Windows build errors. Tested with a default Appveyor config
    that uses Visual Studio 2013. Judging from Brian's email and
    random internet sources, Visual Studio 2015 does have timespec
    and timespec_get, hence the _MSC_VER-based guard which I have
    not tested.

Cc: Jose Fonseca <jfonseca@vmware.com>
Cc: Brian Paul <brianp@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com> (v1)
This commit is contained in:
Nicolai Hähnle
2017-10-22 17:38:45 +02:00
parent c50743f61c
commit f1a3648784
4 changed files with 60 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
include/c11/threads.h
View File

@@ -30,9 +30,6 @@
#define EMULATED_THREADS_H_INCLUDED_
#include <time.h>
#ifdef _MSC_VER
#include <thr/xtimec.h> // for xtime
#endif
#ifndef TIME_UTC
#define TIME_UTC 1
@@ -44,14 +41,6 @@
typedef void (*tss_dtor_t)(void*);
typedef int (*thrd_start_t)(void*);
#ifndef _MSC_VER
struct xtime {
time_t sec;
long nsec;
};
typedef struct xtime xtime;
#endif
/*-------------------- enumeration constants --------------------*/
enum {

39
include/c11/threads_posix.h
View File

@@ -132,19 +132,15 @@ cnd_signal(cnd_t *cond)
// 7.25.3.5
static inline int
cnd_timedwait(cnd_t *cond, mtx_t *mtx, const xtime *xt)
cnd_timedwait(cnd_t *cond, mtx_t *mtx, const struct timespec *abs_time)
{
struct timespec abs_time;
int rt;
assert(mtx != NULL);
assert(cond != NULL);
assert(xt != NULL);
assert(abs_time != NULL);
abs_time.tv_sec = xt->sec;
abs_time.tv_nsec = xt->nsec;
rt = pthread_cond_timedwait(cond, mtx, &abs_time);
rt = pthread_cond_timedwait(cond, mtx, abs_time);
if (rt == ETIMEDOUT)
return thrd_busy;
return (rt == 0) ? thrd_success : thrd_error;
@@ -235,24 +231,21 @@ thrd_yield(void);
// 7.25.4.4
static inline int
mtx_timedlock(mtx_t *mtx, const xtime *xt)
mtx_timedlock(mtx_t *mtx, const struct timespec *ts)
{
assert(mtx != NULL);
assert(xt != NULL);
assert(ts != NULL);
{
#ifdef EMULATED_THREADS_USE_NATIVE_TIMEDLOCK
struct timespec ts;
int rt;
ts.tv_sec = xt->sec;
ts.tv_nsec = xt->nsec;
rt = pthread_mutex_timedlock(mtx, &ts);
rt = pthread_mutex_timedlock(mtx, ts);
if (rt == 0)
return thrd_success;
return (rt == ETIMEDOUT) ? thrd_busy : thrd_error;
#else
time_t expire = time(NULL);
expire += xt->sec;
expire += ts->tv_sec;
while (mtx_trylock(mtx) != thrd_success) {
time_t now = time(NULL);
if (expire < now)
@@ -342,13 +335,10 @@ thrd_join(thrd_t thr, int *res)
// 7.25.5.7
static inline void
thrd_sleep(const xtime *xt)
thrd_sleep(const struct timespec *time_point, struct timespec *remaining)
{
struct timespec req;
assert(xt);
req.tv_sec = xt->sec;
req.tv_nsec = xt->nsec;
nanosleep(&req, NULL);
assert(time_point != NULL);
nanosleep(time_point, remaining);
}
// 7.25.5.8
@@ -392,14 +382,15 @@ tss_set(tss_t key, void *val)
/*-------------------- 7.25.7 Time functions --------------------*/
// 7.25.6.1
#if 0
static inline int
xtime_get(xtime *xt, int base)
timespec_get(struct timespec *ts, int base)
{
if (!xt) return 0;
if (!ts) return 0;
if (base == TIME_UTC) {
xt->sec = time(NULL);
xt->nsec = 0;
clock_gettime(CLOCK_REALTIME, ts);
return base;
}
return 0;
}
#endif

50
include/c11/threads_win32.h
View File

@@ -75,6 +75,17 @@ Configuration macro:
#error EMULATED_THREADS_USE_NATIVE_CV requires _WIN32_WINNT>=0x0600
#endif
/* Visual Studio 2015 and later */
#if _MSC_VER >= 1900
#define HAVE_TIMESPEC
#endif
#ifndef HAVE_TIMESPEC
struct timespec {
time_t tv_sec;
long tv_nsec;
};
#endif
/*---------------------------- macros ----------------------------*/
#ifdef EMULATED_THREADS_USE_NATIVE_CALL_ONCE
@@ -146,9 +157,9 @@ static unsigned __stdcall impl_thrd_routine(void *p)
return (unsigned)code;
}
static DWORD impl_xtime2msec(const xtime *xt)
static DWORD impl_timespec2msec(const struct timespec *ts)
{
return (DWORD)((xt->sec * 1000U) + (xt->nsec / 1000000L));
return (DWORD)((ts->tv_sec * 1000U) + (ts->tv_nsec / 1000000L));
}
#ifdef EMULATED_THREADS_USE_NATIVE_CALL_ONCE
@@ -206,7 +217,7 @@ static void impl_cond_do_signal(cnd_t *cond, int broadcast)
ReleaseSemaphore(cond->sem_queue, nsignal, NULL);
}
static int impl_cond_do_wait(cnd_t *cond, mtx_t *mtx, const xtime *xt)
static int impl_cond_do_wait(cnd_t *cond, mtx_t *mtx, const struct timespec *ts)
{
int nleft = 0;
int ngone = 0;
@@ -219,7 +230,7 @@ static int impl_cond_do_wait(cnd_t *cond, mtx_t *mtx, const xtime *xt)
mtx_unlock(mtx);
w = WaitForSingleObject(cond->sem_queue, xt ? impl_xtime2msec(xt) : INFINITE);
w = WaitForSingleObject(cond->sem_queue, ts ? impl_timespec2msec(ts) : INFINITE);
timeout = (w == WAIT_TIMEOUT);
EnterCriticalSection(&cond->monitor);
@@ -378,15 +389,15 @@ cnd_signal(cnd_t *cond)
// 7.25.3.5
static inline int
cnd_timedwait(cnd_t *cond, mtx_t *mtx, const xtime *xt)
cnd_timedwait(cnd_t *cond, mtx_t *mtx, const struct timespec *abs_time)
{
if (!cond || !mtx || !xt) return thrd_error;
if (!cond || !mtx || !abs_time) return thrd_error;
#ifdef EMULATED_THREADS_USE_NATIVE_CV
if (SleepConditionVariableCS(&cond->condvar, mtx, impl_xtime2msec(xt)))
if (SleepConditionVariableCS(&cond->condvar, mtx, impl_timespec2msec(abs_time)))
return thrd_success;
return (GetLastError() == ERROR_TIMEOUT) ? thrd_busy : thrd_error;
#else
return impl_cond_do_wait(cond, mtx, xt);
return impl_cond_do_wait(cond, mtx, abs_time);
#endif
}
@@ -438,12 +449,12 @@ mtx_lock(mtx_t *mtx)
// 7.25.4.4
static inline int
mtx_timedlock(mtx_t *mtx, const xtime *xt)
mtx_timedlock(mtx_t *mtx, const struct timespec *ts)
{
time_t expire, now;
if (!mtx || !xt) return thrd_error;
if (!mtx || !ts) return thrd_error;
expire = time(NULL);
expire += xt->sec;
expire += ts->tv_sec;
while (mtx_trylock(mtx) != thrd_success) {
now = time(NULL);
if (expire < now)
@@ -579,10 +590,11 @@ thrd_join(thrd_t thr, int *res)
// 7.25.5.7
static inline void
thrd_sleep(const xtime *xt)
thrd_sleep(const struct timespec *time_point, struct timespec *remaining)
{
assert(xt);
Sleep(impl_xtime2msec(xt));
assert(time_point);
assert(!remaining); /* not implemented */
Sleep(impl_timespec2msec(time_point));
}
// 7.25.5.8
@@ -633,14 +645,16 @@ tss_set(tss_t key, void *val)
/*-------------------- 7.25.7 Time functions --------------------*/
// 7.25.6.1
#ifndef HAVE_TIMESPEC
static inline int
xtime_get(xtime *xt, int base)
timespec_get(struct timespec *ts, int base)
{
if (!xt) return 0;
if (!ts) return 0;
if (base == TIME_UTC) {
xt->sec = time(NULL);
xt->nsec = 0;
ts->tv_sec = time(NULL);
ts->tv_nsec = 0;
return base;
}
return 0;
}
#endif

24
src/egl/drivers/dri2/egl_dri2.c
View File

@@ -3064,10 +3064,6 @@ dri2_client_wait_sync(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
struct dri2_egl_sync *dri2_sync = dri2_egl_sync(sync);
unsigned wait_flags = 0;
/* timespecs for cnd_timedwait */
struct timespec current;
xtime expire;
EGLint ret = EGL_CONDITION_SATISFIED_KHR;
/* The EGL_KHR_fence_sync spec states:
@@ -3108,19 +3104,25 @@ dri2_client_wait_sync(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
} else {
/* if reusable sync has not been yet signaled */
if (dri2_sync->base.SyncStatus != EGL_SIGNALED_KHR) {
/* timespecs for cnd_timedwait */
struct timespec current;
struct timespec expire;
/* We override the clock to monotonic when creating the condition
* variable. */
clock_gettime(CLOCK_MONOTONIC, &current);
/* calculating when to expire */
expire.nsec = timeout % 1000000000L;
expire.sec = timeout / 1000000000L;
expire.tv_nsec = timeout % 1000000000L;
expire.tv_sec = timeout / 1000000000L;
expire.nsec += current.tv_nsec;
expire.sec += current.tv_sec;
expire.tv_nsec += current.tv_nsec;
expire.tv_sec += current.tv_sec;
/* expire.nsec now is a number between 0 and 1999999998 */
if (expire.nsec > 999999999L) {
expire.sec++;
expire.nsec -= 1000000000L;
if (expire.tv_nsec > 999999999L) {
expire.tv_sec++;
expire.tv_nsec -= 1000000000L;
}
mtx_lock(&dri2_sync->mutex);