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#ifndef _REG_CACHE_H_
#define _REG_CACHE_H_
#if USE_SICM
#include <sicm_low.h>
//#include <sicm_impl.h>
#endif
#include <stddef.h>
// #define ENABLE_SYSV
#if ENABLE_SYSV
#include <sys/ipc.h>
#endif
/**
* Enumerate the return codes for registration cache functions.
*/
typedef enum _reg_return_t {
RR_SUCCESS=0, /**< success */
RR_FAILURE /**< non-specific failure */
} reg_return_t;
/**
* A registered contiguous memory region.
*/
typedef struct _reg_entry_t {
struct _reg_entry_t *next; /**< next memory region in list */
void *buf; /**< starting address of region */
size_t len; /**< length of region */
void *mapped; /**< starting address of mmap'd region */
int rank; /**< rank where this region lives */
int use_dev; /**< memory is on a device */
#if ENABLE_SYSV
char name[2*SHM_NAME_SIZE]; /**< name of region */
key_t key;
#else
char name[SHM_NAME_SIZE]; /**< name of region */
#endif
#if USE_SICM
#if SICM_OLD
sicm_device *device; /**< pointer to SICM device */
#else
sicm_device_list device; /**< pointer to SICM device */
#endif
#endif
} reg_entry_t;
/* functions
*
* documentation is in the *.c file
*/
reg_return_t reg_cache_init(int nprocs);
reg_return_t reg_cache_destroy();
reg_entry_t *reg_cache_find(int rank, void *buf, size_t len);
reg_entry_t *reg_cache_insert(int rank, void *buf, size_t len, const char *name,
#if ENABLE_SYSV
key_t key,
#endif
void *mapped, int use_dev
#if USE_SICM
#if SICM_OLD
,sicm_device *device
#else
,sicm_device_list device
#endif
#endif
);
reg_return_t reg_cache_delete(int rank, void *buf);
reg_return_t reg_cache_nullify(reg_entry_t *entry);
#endif /* _REG_CACHE_H_ */
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