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//===-- scudo_allocator_combined.h ------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// Scudo Combined Allocator, dispatches allocation & deallocation requests to
/// the Primary or the Secondary backend allocators.
///
//===----------------------------------------------------------------------===//
#ifndef SCUDO_ALLOCATOR_COMBINED_H_
#define SCUDO_ALLOCATOR_COMBINED_H_
#ifndef SCUDO_ALLOCATOR_H_
#error "This file must be included inside scudo_allocator.h."
#endif
template <class PrimaryAllocator, class AllocatorCache,
class SecondaryAllocator>
class ScudoCombinedAllocator {
public:
void init(s32 ReleaseToOSIntervalMs) {
Primary.Init(ReleaseToOSIntervalMs);
Secondary.Init();
Stats.Init();
}
// Primary allocations are always MinAlignment aligned, and as such do not
// require an Alignment parameter.
void *allocatePrimary(AllocatorCache *Cache, uptr ClassId) {
return Cache->Allocate(&Primary, ClassId);
}
// Secondary allocations do not require a Cache, but do require an Alignment
// parameter.
void *allocateSecondary(uptr Size, uptr Alignment) {
return Secondary.Allocate(&Stats, Size, Alignment);
}
void deallocatePrimary(AllocatorCache *Cache, void *Ptr, uptr ClassId) {
Cache->Deallocate(&Primary, ClassId, Ptr);
}
void deallocateSecondary(void *Ptr) {
Secondary.Deallocate(&Stats, Ptr);
}
uptr getActuallyAllocatedSize(void *Ptr, uptr ClassId) {
if (ClassId)
return PrimaryAllocator::ClassIdToSize(ClassId);
return Secondary.GetActuallyAllocatedSize(Ptr);
}
void initCache(AllocatorCache *Cache) {
Cache->Init(&Stats);
}
void destroyCache(AllocatorCache *Cache) {
Cache->Destroy(&Primary, &Stats);
}
void getStats(AllocatorStatCounters StatType) const {
Stats.Get(StatType);
}
private:
PrimaryAllocator Primary;
SecondaryAllocator Secondary;
AllocatorGlobalStats Stats;
};
#endif // SCUDO_ALLOCATOR_COMBINED_H_
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