_macos.h

Netscape NSPR库源码

/* -*- 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 prmacos_h___
#define prmacos_h___

//
// This file contains all changes and additions which need to be made to the NSPR runtime 
// for the Macintosh platform (specifically the Metrowerks environment).  This file should 
// only be incluced in Macintosh builds.
//

#define PR_DLL_SUFFIX		""
#define _PR_LOCAL_THREADS_ONLY
#define _PR_NO_PREEMPT	1
#define _PR_HAVE_ATOMIC_OPS 1

#include "prinit.h"
#include "prio.h"
#include "prlong.h"
#include "prlock.h"
#include "prcvar.h"
#include "prsem.h"
#include "prthread.h"
#include "prtime.h"
#include "prproces.h"

#if !defined(MAC_NSPR_STANDALONE)
#include "macstdlibextras.h"
#endif

#include <stddef.h>
#include <setjmp.h>

#include <Errors.h>
#include <OpenTransport.h>
#include <DriverServices.h>

#define _PR_HAVE_PEEK_BUFFER
#define _PR_PEEK_BUFFER_MAX (16 * 1024)
#define _PR_FD_NEED_EMULATE_MSG_PEEK(fd) 1

struct _MDProcess {
    PRInt8 notused;
};

struct _MDThread {
    jmp_buf      jb;
    int          osErrCode;
	PRLock *     asyncIOLock;
	PRCondVar *  asyncIOCVar;
    PRBool       missedIONotify;
    PRBool       missedAsyncNotify;
    PRBool       asyncNotifyPending;
};

struct _MDThreadStack {
    PRInt8 notused;
};

struct _MDLock {
    PRInt8 notused;
};

struct _MDCVar {
    PRInt8 notused;
};

struct _MDSemaphore {
    PRInt8 notused;
};

struct _MDSegment {
    PRInt8 notused;
};

struct _MDCPU {
    AbsoluteTime    lastThreadSwitch;
    AbsoluteTime    lastWakeUpProcess;
    PRBool          trackScheduling;
};

typedef struct _MDSocketCallerInfo {
	PRThread *	thread;
	void *		cookie;
} _MDSocketCallerInfo;

struct _MDFileDesc {
    PRInt32         osfd;
    PRPackedBool    orderlyDisconnect;
    PRPackedBool    readReady;
    PRPackedBool    writeReady;
    PRPackedBool    exceptReady;
    PRLock *        miscLock;

    /* Server sockets: listen bit tells the notifier func what to do */
    PRBool          doListen;

    /* stored error for non-blocking connects, as a Unix-style error code */
    OTReason        disconnectError;

    _MDSocketCallerInfo  misc;
    _MDSocketCallerInfo  read;
    _MDSocketCallerInfo  write;
};

/*
** Iinitialization Related definitions
*/

#define _MD_EARLY_INIT		_MD_EarlyInit
#define _MD_FINAL_INIT		_MD_FinalInit

/*
** Interrupts Related definitions
*/

#define _MD_GET_INTSOFF()               (_pr_intsOff)

#define _MD_INTSOFF(_is)                                  \
    PR_BEGIN_MACRO                                        \
        ENTER_CRITICAL_REGION();                          \
        (_is) = _PR_MD_GET_INTSOFF();                     \
        _PR_MD_SET_INTSOFF(1);                            \
        LEAVE_CRITICAL_REGION();                          \
    PR_END_MACRO

#if TARGET_CARBON
extern void _MD_SetIntsOff(PRInt32 ints);
#define _MD_SET_INTSOFF(_val)           _MD_SetIntsOff(_val)
#else /* not TARGET_CARBON */
#define _MD_SET_INTSOFF(_val)           (_pr_intsOff = _val)
#endif /* TARGET_CARBON */

#define _MD_START_INTERRUPTS			_MD_StartInterrupts
#define _MD_STOP_INTERRUPTS	    		_MD_StopInterrupts
#define _MD_BLOCK_CLOCK_INTERRUPTS()
#define _MD_UNBLOCK_CLOCK_INTERRUPTS()
#define _MD_DISABLE_CLOCK_INTERRUPTS()
#define _MD_ENABLE_CLOCK_INTERRUPTS()

/*
** CPU Related definitions
*/

#define _MD_PAUSE_CPU		_MD_PauseCPU
#define _MD_CLEANUP_BEFORE_EXIT()
#define _MD_EXIT(status)	exit(status)
#define _MD_INIT_CPUS()
#define _MD_INIT_RUNNING_CPU(cpu) _MD_InitRunningCPU(cpu)

/*
** Process Related definitions
*/

extern struct PRProcess * _MD_CreateProcess(
    const char *path,
    char *const *argv,
    char *const *envp,
    const PRProcessAttr *attr);
#define _MD_CREATE_PROCESS _MD_CreateProcess

extern PRStatus _MD_DetachProcess(PRProcess *process);
#define _MD_DETACH_PROCESS _MD_DetachProcess

extern PRStatus _MD_WaitProcess(PRProcess *process, PRInt32 *exitCode);
#define _MD_WAIT_PROCESS _MD_WaitProcess

extern PRStatus _MD_KillProcess(PRProcess *process);
#define _MD_KILL_PROCESS _MD_KillProcess

/*
** Memory Segments Related definitions
*/

#define _MD_INIT_SEGS()

/*
** Thread Stacks Debugging Related definitions
*/

#define _MD_INIT_STACK		_MD_InitStack
#define _MD_CLEAR_STACK		_MD_ClearStack

/*
** Locks Related definitions
*/

#define _MD_INIT_LOCKS()
#define _MD_NEW_LOCK(lock) (PR_SUCCESS)
#define _MD_FREE_LOCK(lock)
#define _MD_LOCK(lock)
#define _MD_UNLOCK(lock)

/*
** Thread Related definitions
*/

NSPR_API(PRThread *) PR_GetPrimaryThread();

#if defined(powerc) || defined(__powerc)
#define _MD_GET_PC(_t) (*((PRUint32 *)((_t)->md.jb)))
#define _MD_GET_SP(_t) (*((PRUint32 *)((_t)->md.jb) + 2))
#define _MD_GET_TOC(_t) (*((PRUint32 *)((_t)->md.jb) + 3))
#define INIT_STACKPTR(stackTop) ((unsigned char*)stackTop - 128)
#define PR_NUM_GCREGS 70
#else
#define _MD_GET_PC(_t) (*((PRUint32 *)((_t)->md.jb) + 6))
#define _MD_GET_SP(_t) (*((PRUint32 *)((_t)->md.jb) + 12))
#define INIT_STACKPTR(stackTop) ((unsigned char*)stackTop - 4)
#define PR_NUM_GCREGS 13
#endif

#define _MD_DEFAULT_STACK_SIZE (58 * 1024)
#define _MD_MINIMUM_STACK_SIZE (58 * 1024)

/*
** Initialize the thread machine dependent data structure
*/
extern PRStatus _MD_InitThread(PRThread *thread);
#define _MD_INIT_THREAD	_MD_InitThread

/*
** Clean-up the thread machine dependent data structure
*/
#define	_MD_CLEAN_THREAD(_thread)						\
    PR_BEGIN_MACRO				      					\
	PR_DestroyCondVar(_thread->md.asyncIOCVar);			\
	PR_DestroyLock(_thread->md.asyncIOLock);			\
    PR_END_MACRO


/*
** Initialize the thread context preparing it to execute _main.
** *sp = 0 zeros out the sp for the first stack frame so that
** stack walking code can find the top of the stack.
*/
#if defined(powerc) || defined(__powerc)
#define _MD_INIT_CONTEXT(_thread, _sp, _main, _status)	\
    PR_BEGIN_MACRO				      					\
 	unsigned char *sp;									\
 	unsigned long *tvect;								\
	long **jb = (_thread)->md.jb;		      			\
    *((PRBool *)_status) = PR_TRUE;              		\
	(void) setjmp(jb);			      					\
    sp = INIT_STACKPTR(_sp);							\
    *sp = 0;                                            \
    (_MD_GET_SP(_thread)) = (long) sp;   				\
	tvect = (unsigned long *)_main;						\
    (_MD_GET_PC(_thread)) = (int) *tvect;   			\
    (_MD_GET_TOC(_thread)) = (int) *(tvect+1);   		\
	_thread->no_sched = 0;                              \
    PR_END_MACRO
#else
#define _MD_INIT_CONTEXT(_thread, _sp, _main, _status)	\
    PR_BEGIN_MACRO				      					\
 	unsigned char *sp;									\
	long **jb = (_thread)->md.jb;		      			\
    *((PRBool *)_status) = PR_TRUE;              		\
	(void) setjmp(jb);			      					\
    sp = INIT_STACKPTR(_sp);							\
    (_MD_GET_SP(_thread)) = (long) sp;   				\
    (_MD_GET_PC(_thread)) = (int) _main;   				\
	_thread->no_sched = 0;                              \
    PR_END_MACRO
#endif

/*
** Switch away from the current thread context by saving its state and
** calling the thread scheduler. Reload cpu when we come back from the
** context switch because it might have changed.
*/
/*    	ResetTimer();	before _PR_Schedule()		   		*/


#define _MD_SWITCH_CONTEXT(_thread)                                 \
    PR_BEGIN_MACRO                                                  \
    PR_ASSERT(_thread->no_sched);                                   \
    if (!setjmp(_thread->md.jb)) {                                  \
        _MD_SET_LAST_THREAD(_thread);                               \
        if (_PR_MD_CURRENT_CPU()->md.trackScheduling)               \
            _PR_MD_CURRENT_CPU()->md.lastThreadSwitch = UpTime();   \
        _PR_Schedule();                                             \
    } else {                                                        \
        PR_ASSERT(_MD_LAST_THREAD() !=_MD_CURRENT_THREAD());        \
        _MD_LAST_THREAD()->no_sched = 0;                            \
    }                                                               \
    PR_END_MACRO

/*
** Restore a thread context that was saved by _MD_SWITCH_CONTEXT or
** initialized by _MD_INIT_CONTEXT.
*/
#define _MD_RESTORE_CONTEXT(_newThread)	    \
    PR_BEGIN_MACRO			    			\
	long **jb = (_newThread)->md.jb;	    \
	_MD_SET_CURRENT_THREAD(_newThread); 	\
    _newThread->no_sched = 1;		        \
	longjmp(jb, 1);			    			\
    PR_END_MACRO


#define _MD_ERRNO()	 _MD_CURRENT_THREAD()->md.osErrCode

extern PRStatus _MD_wait(PRThread *thread, PRIntervalTime timeout);
#define _MD_WAIT	_MD_wait

/*
** Combined thread model related definitions
*/

#define _MD_CREATE_THREAD(a,b,c,d,e,f) (PR_SUCCESS)
#define _MD_WAKEUP_WAITER(a)
#define _MD_SET_PRIORITY(a,b)

/*
** File I/O Related definitions
*/

extern PRInt32 _PR_MD_WRITE_SYNC(PRFileDesc *fd, void *buf, PRInt32 amount);
#define    _PR_MD_WRITE_SYNC _MD_WRITE_SYNC

struct _MDDir {
	short		ioVRefNum;
	long		ioDirID;
	short		ioFDirIndex;
	char		*currentEntryName;
};

#define PR_DIRECTORY_SEPARATOR		'/'
#define PR_DIRECTORY_SEPARATOR_STR	"/"