1 ///////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (c) 2005, Industrial Light & Magic, a division of Lucas
4 // Digital Ltd. LLC
5 //
6 // All rights reserved.
7 //
8 // Redistribution and use in source and binary forms, with or without
9 // modification, are permitted provided that the following conditions are
10 // met:
11 // * Redistributions of source code must retain the above copyright
12 // notice, this list of conditions and the following disclaimer.
13 // * Redistributions in binary form must reproduce the above
14 // copyright notice, this list of conditions and the following disclaimer
15 // in the documentation and/or other materials provided with the
16 // distribution.
17 // * Neither the name of Industrial Light & Magic nor the names of
18 // its contributors may be used to endorse or promote products derived
19 // from this software without specific prior written permission.
20 //
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 //
33 ///////////////////////////////////////////////////////////////////////////
34
35 //-----------------------------------------------------------------------------
36 //
37 // class Mutex -- implementation for
38 // platforms that support Posix threads
39 //
40 //-----------------------------------------------------------------------------
41
42 #include "IlmBaseConfig.h"
43
44 #if HAVE_PTHREAD
45
46 #include "IlmThreadMutex.h"
47 #include "Iex.h"
48 #include <assert.h>
49
50 namespace IlmThread {
51
52
Mutex()53 Mutex::Mutex ()
54 {
55 if (int error = ::pthread_mutex_init (&_mutex, 0))
56 Iex::throwErrnoExc ("Cannot initialize mutex (%T).", error);
57 }
58
59
~Mutex()60 Mutex::~Mutex ()
61 {
62 int error = ::pthread_mutex_destroy (&_mutex);
63 assert (error == 0);
64 }
65
66
67 void
lock() const68 Mutex::lock () const
69 {
70 if (int error = ::pthread_mutex_lock (&_mutex))
71 Iex::throwErrnoExc ("Cannot lock mutex (%T).", error);
72 }
73
74
75 void
unlock() const76 Mutex::unlock () const
77 {
78 if (int error = ::pthread_mutex_unlock (&_mutex))
79 Iex::throwErrnoExc ("Cannot unlock mutex (%T).", error);
80 }
81
82
83 } // namespace IlmThread
84
85 #endif
86