contrib/llvm/tools/lldb/source/Host/common/ProcessRunLock.cpp

   1 #ifndef _WIN32
   2
   3 #include "lldb/Host/ProcessRunLock.h"
   4
   5 namespace lldb_private {
   6
   7     ProcessRunLock::ProcessRunLock()
   8         : m_running(false)
   9     {
  10         int err = ::pthread_rwlock_init(&m_rwlock, NULL); (void) err;
  11         //#if LLDB_CONFIGURATION_DEBUG
  12         //        assert(err == 0);
  13         //#endif
  14     }
  15
  16     ProcessRunLock::~ProcessRunLock()
  17     {
  18         int err = ::pthread_rwlock_destroy(&m_rwlock); (void) err;
  19         //#if LLDB_CONFIGURATION_DEBUG
  20         //        assert(err == 0);
  21         //#endif
  22     }
  23
  24     bool ProcessRunLock::ReadTryLock()
  25     {
  26         ::pthread_rwlock_rdlock(&m_rwlock);
  27         if (m_running == false)
  28         {
  29             return true;
  30         }
  31         ::pthread_rwlock_unlock(&m_rwlock);
  32         return false;
  33     }
  34
  35     bool ProcessRunLock::ReadUnlock()
  36     {
  37         return ::pthread_rwlock_unlock(&m_rwlock) == 0;
  38     }
  39
  40     bool ProcessRunLock::SetRunning()
  41     {
  42         ::pthread_rwlock_wrlock(&m_rwlock);
  43         m_running = true;
  44         ::pthread_rwlock_unlock(&m_rwlock);
  45         return true;
  46     }
  47
  48     bool ProcessRunLock::TrySetRunning()
  49     {
  50         bool r;
  51
  52         if (::pthread_rwlock_trywrlock(&m_rwlock) == 0)
  53         {
  54             r = !m_running;
  55             m_running = true;
  56             ::pthread_rwlock_unlock(&m_rwlock);
  57             return r;
  58         }
  59         return false;
  60     }
  61
  62     bool ProcessRunLock::SetStopped()
  63     {
  64         ::pthread_rwlock_wrlock(&m_rwlock);
  65         m_running = false;
  66         ::pthread_rwlock_unlock(&m_rwlock);
  67         return true;
  68     }
  69 }
  70
  71 #endif