1 //===-- ProcessRunLock.cpp --------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _WIN32
11 #include "lldb/Host/ProcessRunLock.h"
12 
13 namespace lldb_private {
14 
15 ProcessRunLock::ProcessRunLock() : m_running(false) {
16   int err = ::pthread_rwlock_init(&m_rwlock, NULL);
17   (void)err;
18   //#if LLDB_CONFIGURATION_DEBUG
19   //        assert(err == 0);
20   //#endif
21 }
22 
23 ProcessRunLock::~ProcessRunLock() {
24   int err = ::pthread_rwlock_destroy(&m_rwlock);
25   (void)err;
26   //#if LLDB_CONFIGURATION_DEBUG
27   //        assert(err == 0);
28   //#endif
29 }
30 
31 bool ProcessRunLock::ReadTryLock() {
32   ::pthread_rwlock_rdlock(&m_rwlock);
33   if (m_running == false) {
34     return true;
35   }
36   ::pthread_rwlock_unlock(&m_rwlock);
37   return false;
38 }
39 
40 bool ProcessRunLock::ReadUnlock() {
41   return ::pthread_rwlock_unlock(&m_rwlock) == 0;
42 }
43 
44 bool ProcessRunLock::SetRunning() {
45   ::pthread_rwlock_wrlock(&m_rwlock);
46   m_running = true;
47   ::pthread_rwlock_unlock(&m_rwlock);
48   return true;
49 }
50 
51 bool ProcessRunLock::TrySetRunning() {
52   bool r;
53 
54   if (::pthread_rwlock_trywrlock(&m_rwlock) == 0) {
55     r = !m_running;
56     m_running = true;
57     ::pthread_rwlock_unlock(&m_rwlock);
58     return r;
59   }
60   return false;
61 }
62 
63 bool ProcessRunLock::SetStopped() {
64   ::pthread_rwlock_wrlock(&m_rwlock);
65   m_running = false;
66   ::pthread_rwlock_unlock(&m_rwlock);
67   return true;
68 }
69 }
70 
71 #endif
72