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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef prsystem_h___
#define prsystem_h___

/*
** API to NSPR functions returning system info.
*/
#include "prtypes.h"

PR_BEGIN_EXTERN_C

/*
** Get the host' directory separator.
**  Pathnames are then assumed to be of the form:
**      [<sep><root_component><sep>]*(<component><sep>)<leaf_name>
*/

NSPR_API(char) PR_GetDirectorySeparator(void);

/*
** OBSOLETE -- the function name is misspelled.
** Use PR_GetDirectorySeparator instead.
*/

NSPR_API(char) PR_GetDirectorySepartor(void);

/*
** Get the host' path separator.
**  Paths are assumed to be of the form:
**      <directory>[<sep><directory>]*
*/

NSPR_API(char) PR_GetPathSeparator(void);

/* Types of information available via PR_GetSystemInfo(...) */
typedef enum {
    PR_SI_HOSTNAME,  /* the hostname with the domain name (if any)
                      * removed */
    PR_SI_SYSNAME,
    PR_SI_RELEASE,
    PR_SI_ARCHITECTURE,
    PR_SI_HOSTNAME_UNTRUNCATED, /* the hostname exactly as configured
                                 * on the system */
    PR_SI_RELEASE_BUILD
} PRSysInfo;

/*
** If successful returns a null termintated string in 'buf' for
** the information indicated in 'cmd'. If unseccussful the reason for
** the failure can be retrieved from PR_GetError().
**
** The buffer is allocated by the caller and should be at least
** SYS_INFO_BUFFER_LENGTH bytes in length.
*/

#define SYS_INFO_BUFFER_LENGTH 256

NSPR_API(PRStatus) PR_GetSystemInfo(PRSysInfo cmd, char *buf, PRUint32 buflen);

/*
** Return the number of bytes in a page
*/
NSPR_API(PRInt32) PR_GetPageSize(void);

/*
** Return log2 of the size of a page
*/
NSPR_API(PRInt32) PR_GetPageShift(void);

/*
** PR_GetNumberOfProcessors() -- returns the number of CPUs
**
** Description:
** PR_GetNumberOfProcessors() extracts the number of processors
** (CPUs available in an SMP system) and returns the number.
**
** Parameters:
**   none
**
** Returns:
**   The number of available processors or -1 on error
**
*/
NSPR_API(PRInt32) PR_GetNumberOfProcessors( void );

/*
** PR_GetPhysicalMemorySize() -- returns the amount of system RAM
**
** Description:
** PR_GetPhysicalMemorySize() determines the amount of physical RAM
** in the system and returns the size in bytes.
**
** Parameters:
**   none
**
** Returns:
**   The amount of system RAM, or 0 on failure.
**
*/
NSPR_API(PRUint64) PR_GetPhysicalMemorySize(void);

PR_END_EXTERN_C

#endif /* prsystem_h___ */

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