nearby: snapshot of cl/313536507

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I8936b527079074d5c3af5531b9245063767cc4a7

cpp/platform_v2/impl/shared/posix_condition_variable.cc

@@ -0,0 +1,30 @@
+#include "platform_v2/impl/shared/posix_condition_variable.h"
+
+namespace location {
+namespace nearby {
+namespace posix {
+
+ConditionVariable::ConditionVariable(Mutex* mutex)
+    : mutex_(mutex), attr_(), cond_() {
+  pthread_condattr_init(&attr_);
+
+  pthread_cond_init(&cond_, &attr_);
+}
+
+ConditionVariable::~ConditionVariable() {
+  pthread_cond_destroy(&cond_);
+
+  pthread_condattr_destroy(&attr_);
+}
+
+void ConditionVariable::Notify() { pthread_cond_broadcast(&cond_); }
+
+Exception ConditionVariable::Wait() {
+  pthread_cond_wait(&cond_, &(mutex_->mutex_));
+
+  return {Exception::kSuccess};
+}
+
+}  // namespace posix
+}  // namespace nearby
+}  // namespace location