#ifndef THC_GENERAL_INC
#define THC_GENERAL_INC

#include "THGeneral.h"
#include "THAllocator.h"
#undef log1p

#include "cuda.h"
#include "cuda_runtime.h"
#include "cublas_v2.h"

#cmakedefine USE_MAGMA

#ifdef __cplusplus
# define THC_EXTERNC extern "C"
#else
# define THC_EXTERNC extern
#endif

#ifdef _WIN32
# ifdef THC_EXPORTS
#  define THC_API THC_EXTERNC __declspec(dllexport)
# else
#  define THC_API THC_EXTERNC __declspec(dllimport)
# endif
#else
# define THC_API THC_EXTERNC
#endif

#ifndef THAssert
#define THAssert(exp)                                                   \
  do {                                                                  \
    if (!(exp)) {                                                       \
      _THError(__FILE__, __LINE__, "assert(%s) failed", #exp);          \
    }                                                                   \
  } while(0)
#endif

struct THCRNGState;  /* Random number generator state. */

typedef struct _THCDeviceAllocator {
   cudaError_t (*malloc)(void*, void**, size_t, cudaStream_t);
   cudaError_t (*free)(void*, void*);
   cudaError_t (*shutdown)(void*);
   void* state;
} THCDeviceAllocator;


/* Global state to be held in the cutorch table. */
typedef struct THCState THCState;

THC_API THCState* THCState_alloc();
THC_API void THCState_free(THCState* state);

THC_API void THCudaInit(THCState* state);
THC_API void THCudaShutdown(THCState* state);
THC_API void THCudaEnablePeerToPeerAccess(THCState* state);

/* If device `dev` can access allocations on device `devToAccess`, this will return */
/* 1; otherwise, 0. */
THC_API int THCState_getPeerToPeerAccess(THCState* state, int dev, int devToAccess);
/* Enables or disables allowed p2p access using cutorch copy. If we are */
/* attempting to enable access, throws an error if CUDA cannot enable p2p */
/* access. */
THC_API void THCState_setPeerToPeerAccess(THCState* state, int dev, int devToAccess,
                                          int enable);

/* By default, direct in-kernel access to memory on remote GPUs is
   disabled. When set, this allows direct in-kernel access to remote
   GPUs where GPU/GPU p2p access is enabled and allowed. */
THC_API int THCState_getKernelPeerToPeerAccessEnabled(THCState* state);
THC_API void THCState_setKernelPeerToPeerAccessEnabled(THCState* state, int val);

THC_API struct cudaDeviceProp* THCState_getCurrentDeviceProperties(THCState* state);

THC_API struct THCRNGState* THCState_getRngState(THCState* state);
THC_API THAllocator* THCState_getCudaHostAllocator(THCState* state);
THC_API THCDeviceAllocator* THCState_getDeviceAllocator(THCState* state);

THC_API void THCMagma_init(THCState *state);

/* State manipulators and accessors */
THC_API int THCState_getNumDevices(THCState* state);
THC_API void THCState_reserveStreams(THCState* state, int numStreams, int nonBlocking);
THC_API int THCState_getNumStreams(THCState* state);

THC_API cudaStream_t THCState_getDeviceStream(THCState *state, int device, int stream);
THC_API cudaStream_t THCState_getCurrentStream(THCState *state);
THC_API int THCState_getCurrentStreamIndex(THCState *state);
THC_API void THCState_setCurrentStreamIndex(THCState *state, int stream);

THC_API void THCState_reserveBlasHandles(THCState* state, int numHandles);
THC_API int THCState_getNumBlasHandles(THCState* state);

THC_API cublasHandle_t THCState_getDeviceBlasHandle(THCState *state, int device, int handle);
THC_API cublasHandle_t THCState_getCurrentBlasHandle(THCState *state);
THC_API int THCState_getCurrentBlasHandleIndex(THCState *state);
THC_API void THCState_setCurrentBlasHandleIndex(THCState *state, int handle);

/* For the current device and stream, returns the allocated scratch space */
THC_API void* THCState_getCurrentDeviceScratchSpace(THCState* state);
THC_API void* THCState_getDeviceScratchSpace(THCState* state, int device, int stream);
THC_API size_t THCState_getCurrentDeviceScratchSpaceSize(THCState* state);
THC_API size_t THCState_getDeviceScratchSpaceSize(THCState* state, int device);

#define THCudaCheck(err)  __THCudaCheck(err, __FILE__, __LINE__)
#define THCublasCheck(err)  __THCublasCheck(err,  __FILE__, __LINE__)

THC_API void __THCudaCheck(cudaError_t err, const char *file, const int line);
THC_API void __THCublasCheck(cublasStatus_t status, const char *file, const int line);

THC_API cudaError_t THCudaMalloc(THCState *state, void **ptr, size_t size);
THC_API cudaError_t THCudaFree(THCState *state, void *ptr);
THC_API void THCSetGCHandler(THCState *state,
                             void (*torchGCHandlerFunction)(void *data),
                             void *data );
THC_API void THCHeapUpdate(THCState *state, long size);

#endif