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#pragma once
#include <ATen/MapAllocator.h>
#ifdef __cplusplus
void libshm_init(const char* manager_exec_path);
// Superclass to run a constructor before at::RefcountedMapAllocator
class THManagedMapAllocatorInit {
protected:
THManagedMapAllocatorInit(const char* manager_handle, const char* filename);
std::string manager_handle_;
};
// Like a at::RefcountedMapAllocator, but it also makes use of an external
// shared memory manager process to ensure that shared memory regions actually
// get freed in the end (even if processes lose the memory).
class THManagedMapAllocator : private THManagedMapAllocatorInit,
public at::RefcountedMapAllocator {
public:
THManagedMapAllocator(
const char* manager_handle,
const char* filename,
int flags,
ptrdiff_t size);
void close() override;
~THManagedMapAllocator() {
close();
}
static at::DataPtr makeDataPtr(
const char* manager_handle,
const char* filename,
int flags,
ptrdiff_t size);
static THManagedMapAllocator* fromDataPtr(const at::DataPtr&);
const char* manager_handle() const {
return manager_handle_.c_str();
}
};
#endif
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