/*****************************************************************************

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*****************************************************************************/

/** @file include/os0proc.h
 The interface to the operating system
 process control primitives

 Created 9/30/1995 Heikki Tuuri
 *******************************************************/

#ifndef os0proc_h
#define os0proc_h

#include "univ.i"

#ifdef UNIV_LINUX
#include <sys/ipc.h>
#include <sys/shm.h>
#endif

typedef void *os_process_t;
typedef unsigned long int os_process_id_t;

/** The total amount of memory currently allocated from the operating
system with os_mem_alloc_large(). */
extern ulint os_total_large_mem_allocated;

/** Whether to use large pages in the buffer pool */
extern bool os_use_large_pages;

/** Large page size. This may be a boot-time option on some platforms */
extern uint os_large_page_size;

/** Converts the current process id to a number.
@return process id as a number */
ulint os_proc_get_number(void);

/** Allocates large pages memory.
@param[in,out]	n	Number of bytes to allocate
@return allocated memory */
void *os_mem_alloc_large(ulint *n);

/** Frees large pages memory.
@param[in]	ptr	pointer returned by os_mem_alloc_large()
@param[in]	size	size returned by os_mem_alloc_large() */
void os_mem_free_large(void *ptr, ulint size);

#include "os0proc.ic"

#endif