#include "llvm/Support/LeakDetector.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/StringPool.h"
+#include "llvm/Support/Threading.h"
#include "llvm/System/RWMutex.h"
#include "SymbolTableListTraitsImpl.h"
#include "llvm/ADT/DenseMap.h"
// allocating an additional word in Function for programs which do not use GC
// (i.e., most programs) at the cost of increased overhead for clients which do
// use GC.
-static ManagedStatic<DenseMap<const Function*,PooledStringPtr> > GCNames;
-static ManagedStatic<StringPool> GCNamePool;
+static DenseMap<const Function*,PooledStringPtr> *GCNames;
+static StringPool *GCNamePool;
static ManagedStatic<sys::RWMutex> GCLock;
bool Function::hasGC() const {
if (llvm_is_multithreaded()) {
sys::ScopedReader Reader(&*GCLock);
- return GCNames->count(this);
- } else
- return GCNames->count(this);
+ return GCNames && GCNames->count(this);
+ } else
+ return GCNames && GCNames->count(this);
}
const char *Function::getGC() const {
assert(hasGC() && "Function has no collector");
-
if (llvm_is_multithreaded()) {
sys::ScopedReader Reader(&*GCLock);
return *(*GCNames)[this];
}
void Function::setGC(const char *Str) {
- if (llvm_is_multithreaded()) {
- sys::ScopedWriter Writer(&*GCLock);
- (*GCNames)[this] = GCNamePool->intern(Str);
- } else
- (*GCNames)[this] = GCNamePool->intern(Str);
+ if (llvm_is_multithreaded()) GCLock->writer_acquire();
+ if (!GCNamePool)
+ GCNamePool = new StringPool();
+ if (!GCNames)
+ GCNames = new DenseMap<const Function*,PooledStringPtr>();
+ (*GCNames)[this] = GCNamePool->intern(Str);
+ if (llvm_is_multithreaded()) GCLock->writer_release();
}
void Function::clearGC() {
- if (llvm_is_multithreaded()) {
- sys::ScopedWriter Writer(&*GCLock);
- GCNames->erase(this);
- } else
+ if (llvm_is_multithreaded()) GCLock->writer_acquire();
+ if (GCNames) {
GCNames->erase(this);
+ if (GCNames->empty()) {
+ delete GCNames;
+ GCNames = 0;
+ if (GCNamePool->empty()) {
+ delete GCNamePool;
+ GCNamePool = 0;
+ }
+ }
+ }
+ if (llvm_is_multithreaded()) GCLock->writer_release();
}
/// copyAttributesFrom - copy all additional attributes (those not needed to