mirror of https://gitlab.freedesktop.org/mesa/mesa
237 lines
5.5 KiB
C
237 lines
5.5 KiB
C
/*
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* Copyright 1999-2006 Brian Paul
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* Copyright 2008 VMware, Inc.
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* Copyright 2022 Yonggang Luo
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* SPDX-License-Identifier: MIT
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*/
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#include "util/u_thread.h"
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#include "macros.h"
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#ifdef HAVE_PTHREAD
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#include <signal.h>
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#ifdef HAVE_PTHREAD_NP_H
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#include <pthread_np.h>
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#endif
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#endif
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#ifdef __HAIKU__
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#include <OS.h>
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#endif
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#if DETECT_OS_LINUX && !DETECT_OS_ANDROID
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#include <sched.h>
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#elif defined(_WIN32) && !defined(HAVE_PTHREAD)
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#include <windows.h>
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#endif
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#ifdef __FreeBSD__
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/* pthread_np.h -> sys/param.h -> machine/param.h
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* - defines ALIGN which clashes with our ALIGN
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*/
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#undef ALIGN
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#define cpu_set_t cpuset_t
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#endif
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int
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util_get_current_cpu(void)
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{
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#if DETECT_OS_LINUX && !DETECT_OS_ANDROID
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return sched_getcpu();
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#elif defined(_WIN32) && !defined(HAVE_PTHREAD)
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return GetCurrentProcessorNumber();
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#else
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return -1;
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#endif
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}
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int u_thread_create(thrd_t *thrd, int (*routine)(void *), void *param)
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{
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int ret = thrd_error;
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#ifdef HAVE_PTHREAD
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sigset_t saved_set, new_set;
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sigfillset(&new_set);
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sigdelset(&new_set, SIGSYS);
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/* SIGSEGV is commonly used by Vulkan API tracing layers in order to track
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* accesses in device memory mapped to user space. Blocking the signal hinders
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* that tracking mechanism.
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*/
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sigdelset(&new_set, SIGSEGV);
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pthread_sigmask(SIG_BLOCK, &new_set, &saved_set);
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ret = thrd_create(thrd, routine, param);
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pthread_sigmask(SIG_SETMASK, &saved_set, NULL);
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#else
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ret = thrd_create(thrd, routine, param);
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#endif
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return ret;
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}
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void u_thread_setname( const char *name )
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{
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#if defined(HAVE_PTHREAD)
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#if DETECT_OS_LINUX || DETECT_OS_CYGWIN || DETECT_OS_SOLARIS || defined(__GLIBC__) || DETECT_OS_MANAGARM
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int ret = pthread_setname_np(pthread_self(), name);
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if (ret == ERANGE) {
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char buf[16];
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const size_t len = MIN2(strlen(name), ARRAY_SIZE(buf) - 1);
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memcpy(buf, name, len);
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buf[len] = '\0';
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pthread_setname_np(pthread_self(), buf);
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}
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#elif DETECT_OS_FREEBSD || DETECT_OS_OPENBSD
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pthread_set_name_np(pthread_self(), name);
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#elif DETECT_OS_NETBSD
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pthread_setname_np(pthread_self(), "%s", (void *)name);
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#elif DETECT_OS_APPLE
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pthread_setname_np(name);
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#elif DETECT_OS_HAIKU
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rename_thread(find_thread(NULL), name);
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#else
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#warning Not sure how to call pthread_setname_np
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#endif
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#endif
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(void)name;
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}
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bool
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util_set_thread_affinity(thrd_t thread,
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const uint32_t *mask,
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uint32_t *old_mask,
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unsigned num_mask_bits)
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{
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#if defined(HAVE_PTHREAD_SETAFFINITY)
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cpu_set_t cpuset;
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if (old_mask) {
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if (pthread_getaffinity_np(thread, sizeof(cpuset), &cpuset) != 0)
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return false;
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memset(old_mask, 0, num_mask_bits / 8);
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for (unsigned i = 0; i < num_mask_bits && i < CPU_SETSIZE; i++) {
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if (CPU_ISSET(i, &cpuset))
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old_mask[i / 32] |= 1u << (i % 32);
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}
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}
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CPU_ZERO(&cpuset);
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for (unsigned i = 0; i < num_mask_bits && i < CPU_SETSIZE; i++) {
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if (mask[i / 32] & (1u << (i % 32)))
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CPU_SET(i, &cpuset);
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}
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return pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset) == 0;
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#elif defined(_WIN32) && !defined(HAVE_PTHREAD)
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DWORD_PTR m = mask[0];
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if (sizeof(m) > 4 && num_mask_bits > 32)
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m |= (uint64_t)mask[1] << 32;
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m = SetThreadAffinityMask(thread.handle, m);
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if (!m)
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return false;
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if (old_mask) {
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memset(old_mask, 0, num_mask_bits / 8);
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old_mask[0] = m;
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#ifdef _WIN64
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old_mask[1] = m >> 32;
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#endif
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}
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return true;
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#else
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return false;
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#endif
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}
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int64_t
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util_thread_get_time_nano(thrd_t thread)
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{
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#if defined(HAVE_PTHREAD) && !defined(__APPLE__) && !defined(__HAIKU__) && !defined(__managarm__)
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struct timespec ts;
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clockid_t cid;
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pthread_getcpuclockid(thread, &cid);
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clock_gettime(cid, &ts);
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return (int64_t)ts.tv_sec * 1000000000 + ts.tv_nsec;
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#elif defined(_WIN32)
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union {
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FILETIME time;
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ULONGLONG value;
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} kernel_time, user_time;
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GetThreadTimes((HANDLE)thread.handle, NULL, NULL, &kernel_time.time, &user_time.time);
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return (kernel_time.value + user_time.value) * 100;
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#else
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(void)thread;
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return 0;
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#endif
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}
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#if defined(HAVE_PTHREAD) && !defined(__APPLE__) && !defined(__HAIKU__)
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void util_barrier_init(util_barrier *barrier, unsigned count)
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{
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pthread_barrier_init(barrier, NULL, count);
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}
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void util_barrier_destroy(util_barrier *barrier)
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{
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pthread_barrier_destroy(barrier);
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}
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bool util_barrier_wait(util_barrier *barrier)
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{
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return pthread_barrier_wait(barrier) == PTHREAD_BARRIER_SERIAL_THREAD;
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}
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#else /* If the OS doesn't have its own, implement barriers using a mutex and a condvar */
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void util_barrier_init(util_barrier *barrier, unsigned count)
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{
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barrier->count = count;
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barrier->waiters = 0;
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barrier->sequence = 0;
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(void) mtx_init(&barrier->mutex, mtx_plain);
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cnd_init(&barrier->condvar);
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}
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void util_barrier_destroy(util_barrier *barrier)
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{
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assert(barrier->waiters == 0);
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mtx_destroy(&barrier->mutex);
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cnd_destroy(&barrier->condvar);
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}
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bool util_barrier_wait(util_barrier *barrier)
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{
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mtx_lock(&barrier->mutex);
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assert(barrier->waiters < barrier->count);
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barrier->waiters++;
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if (barrier->waiters < barrier->count) {
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uint64_t sequence = barrier->sequence;
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do {
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cnd_wait(&barrier->condvar, &barrier->mutex);
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} while (sequence == barrier->sequence);
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} else {
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barrier->waiters = 0;
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barrier->sequence++;
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cnd_broadcast(&barrier->condvar);
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}
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mtx_unlock(&barrier->mutex);
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return true;
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}
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#endif
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