1 //===-- Condition.cpp -------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 #include "lldb/Host/Condition.h"
13 #include "lldb/Host/TimeValue.h"
16 using namespace lldb_private;
18 //----------------------------------------------------------------------
19 // Default constructor
21 // The default constructor will initialize a new pthread condition
22 // and maintain the condition in the object state.
23 //----------------------------------------------------------------------
24 Condition::Condition () :
27 ::pthread_cond_init (&m_condition, NULL);
30 //----------------------------------------------------------------------
33 // Destroys the pthread condition that the object owns.
34 //----------------------------------------------------------------------
35 Condition::~Condition ()
37 ::pthread_cond_destroy (&m_condition);
40 //----------------------------------------------------------------------
41 // Unblock all threads waiting for a condition variable
42 //----------------------------------------------------------------------
44 Condition::Broadcast ()
46 return ::pthread_cond_broadcast (&m_condition);
49 //----------------------------------------------------------------------
50 // Get accessor to the pthread condition object
51 //----------------------------------------------------------------------
53 Condition::GetCondition ()
58 //----------------------------------------------------------------------
59 // Unblocks one thread waiting for the condition variable
60 //----------------------------------------------------------------------
64 return ::pthread_cond_signal (&m_condition);
67 //----------------------------------------------------------------------
68 // The Wait() function atomically blocks the current thread
69 // waiting on the owned condition variable, and unblocks the mutex
70 // specified by "mutex". The waiting thread unblocks only after
71 // another thread calls Signal(), or Broadcast() with the same
72 // condition variable, or if "abstime" is valid (non-NULL) this
73 // function will return when the system time reaches the time
74 // specified in "abstime". If "abstime" is NULL this function will
75 // wait for an infinite amount of time for the condition variable
76 // to be signaled or broadcasted.
78 // The current thread re-acquires the lock on "mutex".
79 //----------------------------------------------------------------------
81 Condition::Wait (Mutex &mutex, const TimeValue *abstime, bool *timed_out)
86 if (abstime && abstime->IsValid())
88 struct timespec abstime_ts = abstime->GetAsTimeSpec();
89 err = ::pthread_cond_timedwait (&m_condition, mutex.GetMutex(), &abstime_ts);
92 err = ::pthread_cond_wait (&m_condition, mutex.GetMutex());
93 } while (err == EINTR);
95 if (timed_out != NULL)