HarmonyOS是否支持pthread.h

#include <pthread.h> 
  int unsafe_exit() const { 
#ifdef ANDROID 
  struct sigaction actions; 
  memset(&actions, 0, sizeof(actions)); 
  sigemptyset(&actions.sa_mask); 
  actions.sa_flags = 0; 
  actions.sa_handler = &exit_handler; 
  sigaction(SIGUSR2, &actions, NULL); 
  ASSERT2(false, " use SIGUSR2(handler call pthread_exit) to pthread_cancel"); 
  return kill(SIGUSR2); 
#else 
  return pthread_cancel(tid()); 
#endif
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/mnt/c/harmony_project/harmonyf3cftlog/Proj/HarmonyOS/FTLog/cpp/../../../../Src/mars/comm/thread/../unix/thread/thread.h:327:16: error: use of undeclared identifier 'pthread_cancel' 
return pthread_cancel(tid()); 
^ 
1 error generated.
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