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364 lines
12 KiB
C
364 lines
12 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape Portable Runtime (NSPR).
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef pprthred_h___
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#define pprthred_h___
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/*
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** API for PR private functions. These calls are to be used by internal
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** developers only.
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*/
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#include "nspr.h"
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#if defined(XP_OS2)
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#define INCL_DOS
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#define INCL_DOSERRORS
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#define INCL_WIN
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#include <os2.h>
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#endif
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PR_BEGIN_EXTERN_C
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/*---------------------------------------------------------------------------
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** THREAD PRIVATE FUNCTIONS
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---------------------------------------------------------------------------*/
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/*
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** Associate a thread object with an existing native thread.
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** "type" is the type of thread object to attach
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** "priority" is the priority to assign to the thread
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** "stack" defines the shape of the threads stack
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**
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** This can return NULL if some kind of error occurs, or if memory is
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** tight. This call invokes "start(obj,arg)" and returns when the
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** function returns. The thread object is automatically destroyed.
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**
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** This call is not normally needed unless you create your own native
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** thread. PR_Init does this automatically for the primordial thread.
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*/
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NSPR_API(PRThread*) PR_AttachThread(PRThreadType type,
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PRThreadPriority priority,
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PRThreadStack *stack);
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/*
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** Detach the nspr thread from the currently executing native thread.
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** The thread object will be destroyed and all related data attached
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** to it. The exit procs will be invoked.
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**
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** This call is not normally needed unless you create your own native
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** thread. PR_Exit will automatially detach the nspr thread object
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** created by PR_Init for the primordial thread.
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**
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** This call returns after the nspr thread object is destroyed.
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*/
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NSPR_API(void) PR_DetachThread(void);
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/*
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** Get the id of the named thread. Each thread is assigned a unique id
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** when it is created or attached.
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*/
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NSPR_API(PRUint32) PR_GetThreadID(PRThread *thread);
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/*
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** Set the procedure that is called when a thread is dumped. The procedure
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** will be applied to the argument, arg, when called. Setting the procedure
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** to NULL effectively removes it.
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*/
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typedef void (*PRThreadDumpProc)(PRFileDesc *fd, PRThread *t, void *arg);
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NSPR_API(void) PR_SetThreadDumpProc(
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PRThread* thread, PRThreadDumpProc dump, void *arg);
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/*
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** Get this thread's affinity mask. The affinity mask is a 32 bit quantity
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** marking a bit for each processor this process is allowed to run on.
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** The processor mask is returned in the mask argument.
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** The least-significant-bit represents processor 0.
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**
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** Returns 0 on success, -1 on failure.
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*/
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NSPR_API(PRInt32) PR_GetThreadAffinityMask(PRThread *thread, PRUint32 *mask);
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/*
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** Set this thread's affinity mask.
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**
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** Returns 0 on success, -1 on failure.
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*/
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NSPR_API(PRInt32) PR_SetThreadAffinityMask(PRThread *thread, PRUint32 mask );
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/*
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** Set the default CPU Affinity mask.
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**
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*/
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NSPR_API(PRInt32) PR_SetCPUAffinityMask(PRUint32 mask);
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/*
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** Show status of all threads to standard error output.
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*/
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NSPR_API(void) PR_ShowStatus(void);
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/*
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** Set thread recycle mode to on (1) or off (0)
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*/
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NSPR_API(void) PR_SetThreadRecycleMode(PRUint32 flag);
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/*---------------------------------------------------------------------------
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** THREAD PRIVATE FUNCTIONS FOR GARBAGE COLLECTIBLE THREADS
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---------------------------------------------------------------------------*/
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/*
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** Only Garbage collectible threads participate in resume all, suspend all and
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** enumeration operations. They are also different during creation when
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** platform specific action may be needed (For example, all Solaris GC able
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** threads are bound threads).
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*/
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/*
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** Same as PR_CreateThread except that the thread is marked as garbage
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** collectible.
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*/
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NSPR_API(PRThread*) PR_CreateThreadGCAble(PRThreadType type,
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void (*start)(void *arg),
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void *arg,
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PRThreadPriority priority,
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PRThreadScope scope,
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PRThreadState state,
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PRUint32 stackSize);
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/*
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** Same as PR_AttachThread except that the thread being attached is marked as
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** garbage collectible.
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*/
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NSPR_API(PRThread*) PR_AttachThreadGCAble(PRThreadType type,
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PRThreadPriority priority,
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PRThreadStack *stack);
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/*
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** Mark the thread as garbage collectible.
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*/
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NSPR_API(void) PR_SetThreadGCAble(void);
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/*
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** Unmark the thread as garbage collectible.
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*/
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NSPR_API(void) PR_ClearThreadGCAble(void);
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/*
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** This routine prevents all other GC able threads from running. This call is needed by
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** the garbage collector.
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*/
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NSPR_API(void) PR_SuspendAll(void);
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/*
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** This routine unblocks all other GC able threads that were suspended from running by
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** PR_SuspendAll(). This call is needed by the garbage collector.
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*/
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NSPR_API(void) PR_ResumeAll(void);
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/*
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** Return the thread stack pointer of the given thread.
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** Needed by the garbage collector.
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*/
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NSPR_API(void *) PR_GetSP(PRThread *thread);
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/*
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** Save the registers that the GC would find interesting into the thread
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** "t". isCurrent will be non-zero if the thread state that is being
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** saved is the currently executing thread. Return the address of the
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** first register to be scanned as well as the number of registers to
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** scan in "np".
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**
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** If "isCurrent" is non-zero then it is allowed for the thread context
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** area to be used as scratch storage to hold just the registers
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** necessary for scanning.
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**
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** This function simply calls the internal function _MD_HomeGCRegisters().
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*/
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NSPR_API(PRWord *) PR_GetGCRegisters(PRThread *t, int isCurrent, int *np);
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/*
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** (Get|Set)ExecutionEnvironent
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**
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** Used by Java to associate it's execution environment so garbage collector
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** can find it. If return is NULL, then it's probably not a collectable thread.
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**
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** There's no locking required around these calls.
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*/
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NSPR_API(void*) GetExecutionEnvironment(PRThread *thread);
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NSPR_API(void) SetExecutionEnvironment(PRThread* thread, void *environment);
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/*
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** Enumeration function that applies "func(thread,i,arg)" to each active
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** thread in the process. The enumerator returns PR_SUCCESS if the enumeration
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** should continue, any other value is considered failure, and enumeration
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** stops, returning the failure value from PR_EnumerateThreads.
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** Needed by the garbage collector.
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*/
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typedef PRStatus (PR_CALLBACK *PREnumerator)(PRThread *t, int i, void *arg);
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NSPR_API(PRStatus) PR_EnumerateThreads(PREnumerator func, void *arg);
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/*
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** Signature of a thread stack scanning function. It is applied to every
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** contiguous group of potential pointers within a thread. Count denotes the
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** number of pointers.
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*/
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typedef PRStatus
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(PR_CALLBACK *PRScanStackFun)(PRThread* t,
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void** baseAddr, PRUword count, void* closure);
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/*
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** Applies scanFun to all contiguous groups of potential pointers
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** within a thread. This includes the stack, registers, and thread-local
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** data. If scanFun returns a status value other than PR_SUCCESS the scan
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** is aborted, and the status value is returned.
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*/
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NSPR_API(PRStatus)
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PR_ThreadScanStackPointers(PRThread* t,
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PRScanStackFun scanFun, void* scanClosure);
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/*
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** Calls PR_ThreadScanStackPointers for every thread.
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*/
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NSPR_API(PRStatus)
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PR_ScanStackPointers(PRScanStackFun scanFun, void* scanClosure);
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/*
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** Returns a conservative estimate on the amount of stack space left
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** on a thread in bytes, sufficient for making decisions about whether
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** to continue recursing or not.
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*/
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NSPR_API(PRUword)
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PR_GetStackSpaceLeft(PRThread* t);
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/*---------------------------------------------------------------------------
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** THREAD CPU PRIVATE FUNCTIONS
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---------------------------------------------------------------------------*/
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/*
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** Get a pointer to the primordial CPU.
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*/
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NSPR_API(struct _PRCPU *) _PR_GetPrimordialCPU(void);
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/*---------------------------------------------------------------------------
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** THREAD SYNCHRONIZATION PRIVATE FUNCTIONS
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---------------------------------------------------------------------------*/
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/*
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** Create a new named monitor (named for debugging purposes).
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** Monitors are re-entrant locks with a built-in condition variable.
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**
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** This may fail if memory is tight or if some operating system resource
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** is low.
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*/
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NSPR_API(PRMonitor*) PR_NewNamedMonitor(const char* name);
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/*
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** Test and then lock the lock if it's not already locked by some other
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** thread. Return PR_FALSE if some other thread owned the lock at the
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** time of the call.
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*/
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NSPR_API(PRBool) PR_TestAndLock(PRLock *lock);
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/*
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** Test and then enter the mutex associated with the monitor if it's not
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** already entered by some other thread. Return PR_FALSE if some other
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** thread owned the mutex at the time of the call.
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*/
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NSPR_API(PRBool) PR_TestAndEnterMonitor(PRMonitor *mon);
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/*
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** Return the number of times that the current thread has entered the
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** mutex. Returns zero if the current thread has not entered the mutex.
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*/
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NSPR_API(PRIntn) PR_GetMonitorEntryCount(PRMonitor *mon);
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/*
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** Just like PR_CEnterMonitor except that if the monitor is owned by
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** another thread NULL is returned.
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*/
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NSPR_API(PRMonitor*) PR_CTestAndEnterMonitor(void *address);
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/*---------------------------------------------------------------------------
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** PLATFORM-SPECIFIC INITIALIZATION FUNCTIONS
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---------------------------------------------------------------------------*/
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#if defined(IRIX)
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/*
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** Irix specific initialization funtion to be called before PR_Init
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** is called by the application. Sets the CONF_INITUSERS and CONF_INITSIZE
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** attributes of the shared arena set up by nspr.
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**
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** The environment variables _NSPR_IRIX_INITUSERS and _NSPR_IRIX_INITSIZE
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** can also be used to set these arena attributes. If _NSPR_IRIX_INITUSERS
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** is set, but not _NSPR_IRIX_INITSIZE, the value of the CONF_INITSIZE
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** attribute of the nspr arena is scaled as a function of the
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** _NSPR_IRIX_INITUSERS value.
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**
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** If the _PR_Irix_Set_Arena_Params() is called in addition to setting the
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** environment variables, the values of the environment variables are used.
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**
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*/
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NSPR_API(void) _PR_Irix_Set_Arena_Params(PRInt32 initusers, PRInt32 initsize);
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#endif /* IRIX */
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#if defined(XP_OS2)
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/*
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** These functions need to be called at the start and end of a thread.
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** An EXCEPTIONREGISTRATIONRECORD must be declared on the stack and its
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** address passed to the two functions.
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*/
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NSPR_API(void) PR_OS2_SetFloatExcpHandler(EXCEPTIONREGISTRATIONRECORD* e);
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NSPR_API(void) PR_OS2_UnsetFloatExcpHandler(EXCEPTIONREGISTRATIONRECORD* e);
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#endif /* XP_OS2 */
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/* I think PR_GetMonitorEntryCount is useless. All you really want is this... */
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#define PR_InMonitor(m) (PR_GetMonitorEntryCount(m) > 0)
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/*---------------------------------------------------------------------------
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** Special X-Lock hack for client
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---------------------------------------------------------------------------*/
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#ifdef XP_UNIX
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extern void PR_XLock(void);
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extern void PR_XUnlock(void);
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extern PRBool PR_XIsLocked(void);
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#endif /* XP_UNIX */
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PR_END_EXTERN_C
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#endif /* pprthred_h___ */
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