prsystem.h

linux下的一款播放器

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

#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,
    PR_SI_SYSNAME,
    PR_SI_RELEASE,
    PR_SI_ARCHITECTURE
} 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_END_EXTERN_C

#endif /* prsystem_h___ */