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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "starboard/common/condition_variable.h"
#include <errno.h>
#include <pthread.h>
#include <time.h>
#include "starboard/common/time.h"
#include "starboard/shared/pthread/is_success.h"
#include "starboard/shared/pthread/types_internal.h"
#include "starboard/shared/starboard/lazy_initialization_internal.h"
using starboard::shared::starboard::EnsureInitialized;
SbConditionVariableResult SbConditionVariableWaitTimed(
SbConditionVariable* condition,
SbMutex* mutex,
int64_t timeout) {
if (!condition || !mutex) {
return kSbConditionVariableFailed;
}
if (timeout < 0) {
timeout = 0;
}
#if !SB_HAS_QUIRK(NO_CONDATTR_SETCLOCK_SUPPORT)
int64_t timeout_time_usec = starboard::CurrentMonotonicTime() + timeout;
#else // !SB_HAS_QUIRK(NO_CONDATTR_SETCLOCK_SUPPORT)
int64_t timeout_time_usec = starboard::CurrentPosixTime() + timeout;
#endif // !SB_HAS_QUIRK(NO_CONDATTR_SETCLOCK_SUPPORT)
// Detect overflow if timeout is near kSbInt64Max. Since timeout can't be
// negative at this point, if it goes negative after adding now, we know we've
// gone over. Especially posix now, which has a 400 year advantage over
// Chromium (Windows) now.
if (timeout_time_usec < 0) {
timeout_time_usec = kSbInt64Max;
}
struct timespec timeout_ts;
timeout_ts.tv_sec = timeout_time_usec / 1'000'000;
timeout_ts.tv_nsec = (timeout_time_usec % 1'000'000) * 1000;
if (!EnsureInitialized(
&(SB_PTHREAD_INTERNAL_CONDITION(condition)->initialized_state))) {
// The condition variable is set to SB_CONDITION_VARIABLE_INITIALIZER and
// is uninitialized, so call SbConditionVariableCreate() to initialize the
// condition variable. SbConditionVariableCreate() is responsible for
// marking the variable as initialized.
SbConditionVariableCreate(condition, mutex);
}
int result = pthread_cond_timedwait(
&(SB_PTHREAD_INTERNAL_CONDITION(condition)->condition),
SB_PTHREAD_INTERNAL_MUTEX(mutex), &timeout_ts);
if (IsSuccess(result)) {
return kSbConditionVariableSignaled;
}
if (result == ETIMEDOUT) {
return kSbConditionVariableTimedOut;
}
return kSbConditionVariableFailed;
}