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Commit 81800ad3 authored by Myles Watson's avatar Myles Watson
Browse files

osi: Use atomic_exchange to protect is_joined 

Test: Switch users with Bluetooth enabled
     (Disables/Enables Bluetooth under high load)
Change-Id: I34c5579b75620970f756fff28ccc07cf76599a94
parent b0540d2b

system/osi/src/thread.cc

+4 −5
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ 


#include "osi/include/thread.h"



#include <atomic>



#include <base/logging.h>

#include <errno.h>

#include <malloc.h>
@@ -38,7 +40,7 @@ 
#include "osi/include/semaphore.h"



struct thread_t {

  bool is_joined;

  std::atomic_bool is_joined{false};

  pthread_t pthread;

  pid_t tid;

  char name[THREAD_NAME_MAX + 1];
@@ -117,12 +119,9 @@ void thread_free(thread_t* thread) { 
void thread_join(thread_t* thread) {

  CHECK(thread != NULL);



  // TODO(zachoverflow): use a compare and swap when ready

  if (!thread->is_joined) {

    thread->is_joined = true;

  if (!std::atomic_exchange(&thread->is_joined, true))

    pthread_join(thread->pthread, NULL);

}

}



bool thread_post(thread_t* thread, thread_fn func, void* context) {

  CHECK(thread != NULL);