Revision: 55029
http://brlcad.svn.sourceforge.net/brlcad/?rev=55029&view=rev
Author: brlcad
Date: 2013-04-03 15:20:29 +0000 (Wed, 03 Apr 2013)
Log Message:
-----------
need to be careful to not dereference the specific value for single-threaded
contexts. initialize to cpu 0 so we can always return asane. valueue in
bu_parallel_id().
Modified Paths:
--------------
brlcad/trunk/src/libbu/thread.cpp
Modified: brlcad/trunk/src/libbu/thread.cpp
===================================================================
--- brlcad/trunk/src/libbu/thread.cpp 2013-04-03 14:02:19 UTC (rev 55028)
+++ brlcad/trunk/src/libbu/thread.cpp 2013-04-03 15:20:29 UTC (rev 55029)
@@ -47,9 +47,21 @@
private:
pthread_key_t key;
std::vector<T*> vals;
+protected:
+ void set(T& val) {
+ T* value = new T(val);
+ vals.push_back(value);
+ pthread_setspecific(key, value);
+ }
+ T* get() {
+ T* val = static_cast<T*>(pthread_getspecific(key));
+ return val;
+ }
public:
ThreadLocal() {
+ int cpu0 = 0;
pthread_key_create(&key, NULL);
+ set(cpu0);
}
~ThreadLocal() {
pthread_key_delete(key);
@@ -60,16 +72,17 @@
vals.clear();
}
ThreadLocal& operator=(T& val) {
- T* value = new T(val);
- vals.push_back(value);
- pthread_setspecific(key, value);
+ set(val);
return *this;
}
bool operator!() {
- return (pthread_getspecific(key) == NULL);
+ return (get() == NULL);
}
operator T() {
- return *static_cast<T*>(pthread_getspecific(key));
+ T* val = get();
+ if (!val)
+ return 0;
+ return *val;
}
};
static ThreadLocal<int> thread_cpu;
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