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//===-- ObjectCache.h - Class definition for the ObjectCache -----C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_EXECUTIONENGINE_OBJECTCACHE_H
#define LLVM_LIB_EXECUTIONENGINE_OBJECTCACHE_H
#include "llvm/Support/MemoryBuffer.h"
namespace llvm {
class Module;
/// This is the base ObjectCache type which can be provided to an
/// ExecutionEngine for the purpose of avoiding compilation for Modules that
/// have already been compiled and an object file is available.
class ObjectCache {
public:
ObjectCache() { }
virtual ~ObjectCache() { }
/// notifyObjectCompiled - Provides a pointer to compiled code for Module M.
virtual void notifyObjectCompiled(const Module *M, const MemoryBuffer *Obj) = 0;
/// getObjectCopy - Returns a pointer to a newly allocated MemoryBuffer that
/// contains the object which corresponds with Module M, or 0 if an object is
/// not available. The caller owns the MemoryBuffer returned by this function.
MemoryBuffer* getObjectCopy(const Module* M) {
const MemoryBuffer* Obj = getObject(M);
if (Obj)
return MemoryBuffer::getMemBufferCopy(Obj->getBuffer());
else
return 0;
}
protected:
/// getObject - Returns a pointer to a MemoryBuffer that contains an object
/// that corresponds with Module M, or 0 if an object is not available.
/// The pointer returned by this function is not suitable for loading because
/// the memory is read-only and owned by the ObjectCache. To retrieve an
/// owning pointer to a MemoryBuffer (which is suitable for calling
/// RuntimeDyld::loadObject() with) use getObjectCopy() instead.
virtual const MemoryBuffer* getObject(const Module* M) = 0;
};
}
#endif
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