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authorMathias Agopian <mathias@google.com>2009-07-13 21:59:37 -0700
committerMathias Agopian <mathias@google.com>2009-07-13 22:06:36 -0700
commitfb4f266a1b9f6a20e256d192a940ae4ccc510fad (patch)
treef78e179753657d3ee9f0132c7433e3099162e9f2 /include/utils/threads.h
parent3a5351e4437fc2c220bc68a431bd4a1a00a653fa (diff)
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add a ctor to Mutex to specify the type, which can be shared. This is used by sf and af an soon will allow some optimization in the kernel for non shared mutexes
Diffstat (limited to 'include/utils/threads.h')
-rw-r--r--include/utils/threads.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/utils/threads.h b/include/utils/threads.h
index 5c03965..e9b0788 100644
--- a/include/utils/threads.h
+++ b/include/utils/threads.h
@@ -190,8 +190,14 @@ inline thread_id_t getThreadId() {
*/
class Mutex {
public:
+ enum {
+ NORMAL = 0,
+ SHARED = 1
+ };
+
Mutex();
Mutex(const char* name);
+ Mutex(int type, const char* name = NULL);
~Mutex();
// lock or unlock the mutex
@@ -235,6 +241,17 @@ inline Mutex::Mutex() {
inline Mutex::Mutex(const char* name) {
pthread_mutex_init(&mMutex, NULL);
}
+inline Mutex::Mutex(int type, const char* name) {
+ if (type == SHARED) {
+ pthread_mutexattr_t attr;
+ pthread_mutexattr_init(&attr);
+ pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+ pthread_mutex_init(&mMutex, &attr);
+ pthread_mutexattr_destroy(&attr);
+ } else {
+ pthread_mutex_init(&mMutex, NULL);
+ }
+}
inline Mutex::~Mutex() {
pthread_mutex_destroy(&mMutex);
}