//===-- Annotation.cpp - Implement the Annotation Classes -----------------===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
// This file implements the AnnotationManager class.
//
//===----------------------------------------------------------------------===//
-#include <map>
#include "llvm/Support/Annotation.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/System/RWMutex.h"
+#include <map>
+#include <cstring>
using namespace llvm;
Annotation::~Annotation() {} // Designed to be subclassed
}
}
+namespace {
+ class StrCmp {
+ public:
+ bool operator()(const char *a, const char *b) const {
+ return strcmp(a, b) < 0;
+ }
+ };
+}
-typedef std::map<const std::string, unsigned> IDMapType;
+typedef std::map<const char*, unsigned, StrCmp> IDMapType;
static unsigned IDCounter = 0; // Unique ID counter
// Static member to ensure initialiation on demand.
-static IDMapType &getIDMap() { static IDMapType TheMap; return TheMap; }
+static ManagedStatic<IDMapType> IDMap;
+static ManagedStatic<sys::SmartRWMutex<true> > AnnotationsLock;
// On demand annotation creation support...
typedef Annotation *(*AnnFactory)(AnnotationID, const Annotable *, void *);
typedef std::map<unsigned, std::pair<AnnFactory,void*> > FactMapType;
-static FactMapType *TheFactMap = 0;
+static ManagedStatic<FactMapType> TheFactMap;
static FactMapType &getFactMap() {
- if (TheFactMap == 0)
- TheFactMap = new FactMapType();
return *TheFactMap;
}
static void eraseFromFactMap(unsigned ID) {
- assert(TheFactMap && "No entries found!");
+ sys::SmartScopedWriter<true> Writer(&*AnnotationsLock);
TheFactMap->erase(ID);
- if (TheFactMap->empty()) { // Delete when empty
- delete TheFactMap;
- TheFactMap = 0;
- }
}
-AnnotationID AnnotationManager::getID(const std::string &Name) { // Name -> ID
- IDMapType::iterator I = getIDMap().find(Name);
- if (I == getIDMap().end()) {
- getIDMap()[Name] = IDCounter++; // Add a new element
- return IDCounter-1;
+AnnotationID AnnotationManager::getID(const char *Name) { // Name -> ID
+ AnnotationsLock->reader_acquire();
+ IDMapType::iterator I = IDMap->find(Name);
+ IDMapType::iterator E = IDMap->end();
+ AnnotationsLock->reader_release();
+
+ if (I == E) {
+ sys::SmartScopedWriter<true> Writer(&*AnnotationsLock);
+ I = IDMap->find(Name);
+ if (I == IDMap->end())
+ (*IDMap)[Name] = IDCounter++; // Add a new element
+ return AnnotationID(IDCounter-1);
}
- return I->second;
+ return AnnotationID(I->second);
}
// getID - Name -> ID + registration of a factory function for demand driven
// annotation support.
-AnnotationID AnnotationManager::getID(const std::string &Name, Factory Fact,
- void *Data) {
+AnnotationID AnnotationManager::getID(const char *Name, Factory Fact,
+ void *Data) {
AnnotationID Result(getID(Name));
registerAnnotationFactory(Result, Fact, Data);
- return Result;
+ return Result;
}
-
// getName - This function is especially slow, but that's okay because it should
// only be used for debugging.
//
-const std::string &AnnotationManager::getName(AnnotationID ID) { // ID -> Name
- IDMapType &TheMap = getIDMap();
+const char *AnnotationManager::getName(AnnotationID ID) { // ID -> Name
+ sys::SmartScopedReader<true> Reader(&*AnnotationsLock);
+ IDMapType &TheMap = *IDMap;
for (IDMapType::iterator I = TheMap.begin(); ; ++I) {
assert(I != TheMap.end() && "Annotation ID is unknown!");
if (I->second == ID.ID) return I->first;
}
}
-
// registerAnnotationFactory - This method is used to register a callback
-// function used to create an annotation on demand if it is needed by the
+// function used to create an annotation on demand if it is needed by the
// Annotable::findOrCreateAnnotation method.
//
-void AnnotationManager::registerAnnotationFactory(AnnotationID ID,
- AnnFactory F,
- void *ExtraData) {
- if (F)
+void AnnotationManager::registerAnnotationFactory(AnnotationID ID, AnnFactory F,
+ void *ExtraData) {
+ if (F) {
+ sys::SmartScopedWriter<true> Writer(&*AnnotationsLock);
getFactMap()[ID.ID] = std::make_pair(F, ExtraData);
- else
+ } else {
eraseFromFactMap(ID.ID);
+ }
}
// createAnnotation - Create an annotation of the specified ID for the
// specified object, using a register annotation creation function.
//
-Annotation *AnnotationManager::createAnnotation(AnnotationID ID,
- const Annotable *Obj) {
+Annotation *AnnotationManager::createAnnotation(AnnotationID ID,
+ const Annotable *Obj) {
+ AnnotationsLock->reader_acquire();
FactMapType::iterator I = getFactMap().find(ID.ID);
- if (I == getFactMap().end()) return 0;
+ if (I == getFactMap().end()) {
+ AnnotationsLock->reader_release();
+ return 0;
+ }
+
+ AnnotationsLock->reader_release();
return I->second.first(ID, Obj, I->second.second);
}