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/* -*- 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.
*/
/* RCThread.h */
#if defined(_RCTHREAD_H)
#else
#define _RCTHREAD_H
#include "rcbase.h"
#include <prthread.h>
class RCInterval;
class PR_IMPLEMENT(RCThreadPrivateData)
{
public:
RCThreadPrivateData();
RCThreadPrivateData(const RCThreadPrivateData&);
virtual ~RCThreadPrivateData();
virtual void Release() = 0;
}; /* RCThreadPrivateData */
class PR_IMPLEMENT(RCThread): public RCBase
{
public:
typedef enum
{
local = PR_LOCAL_THREAD, global = PR_GLOBAL_THREAD
} Scope;
typedef enum
{
joinable = PR_JOINABLE_THREAD, unjoinable = PR_UNJOINABLE_THREAD
} State;
typedef enum
{
first = PR_PRIORITY_FIRST,
low = PR_PRIORITY_LOW,
normal = PR_PRIORITY_NORMAL,
high = PR_PRIORITY_HIGH,
urgent = PR_PRIORITY_URGENT,
last = PR_PRIORITY_LAST
} Priority;
/*
* Create a new thread, providing scope and joinability state.
*/
RCThread(Scope scope, State state, PRUint32 stackSize=0);
/*
* New threads are created in a suspended state. It must be 'started"
* before it begins execution in the class' defined 'RootFunction()'.
*/
virtual PRStatus Start();
/*
* If a thread is created joinable, then the thread's object exists
* until join is called. The thread that calls join will block until
* the target thread returns from it's root function.
*/
virtual PRStatus Join();
/*
* The priority of a newly created thread is the same as the creator.
* The priority may be changed either by the new thread itself, by
* the creator or any other arbitrary thread.
*/
virtual void SetPriority(Priority newPriority);
/*
* Interrupt another thread, causing it to stop what it
* is doing and return with a well known error code.
*/
virtual PRStatus Interrupt();
/*
* And in case a thread was interrupted and didn't get a chance
* to have the notification delivered, a way to cancel the pending
* status.
*/
static void ClearInterrupt();
/*
* Methods to discover the attributes of an existing thread.
*/
static PRThread *Self();
Scope GetScope() const;
State GetState() const;
Priority GetPriority() const;
/*
* Thread private data
*/
static PRStatus NewPrivateIndex(PRUintn* index);
/*
* Getting it - if you want to modify, make a copy
*/
static RCThreadPrivateData* GetPrivateData(PRUintn index);
/*
* Setting it to <empty> - deletes existing data
*/
static PRStatus SetPrivateData(PRUintn index);
/*
* Setting it - runtime will make a copy, freeing old iff necessary
*/
static PRStatus SetPrivateData(PRUintn index, RCThreadPrivateData* data);
/*
* Scheduling control
*/
static PRStatus Sleep(const RCInterval& ticks);
friend void nas_Root(void*);
friend class RCPrimordialThread;
protected:
/*
* The instantiator of a class must not call the destructor. The base
* implementation of Join will, and if the thread is created unjoinable,
* then the code that called the RootFunction will call the desctructor.
*/
virtual ~RCThread();
private:
/*
* This is where a newly created thread begins execution. Returning
* from this function is equivalent to terminating the thread.
*/
virtual void RootFunction() = 0;
PRThread *identity;
/* Threads are unstarted until started - pretty startling */
enum {ex_unstarted, ex_started} execution;
/* There is no public default constructor or copy constructor */
RCThread();
RCThread(const RCThread&);
/* And there is no assignment operator */
void operator=(const RCThread&);
public:
static RCPrimordialThread *WrapPrimordialThread();
};
/*
** class RCPrimordialThread
*/
class PR_IMPLEMENT(RCPrimordialThread): public RCThread
{
public:
/*
** The primordial thread can (optionally) wait for all created
** threads to terminate before allowing the process to exit.
** Not calling Cleanup() before returning from main() will cause
** the immediate termination of the entire process, including
** any running threads.
*/
static PRStatus Cleanup();
/*
** Only the primordial thread is allowed to adjust the number of
** virtual processors of the runtime. It's a lame security thing.
*/
static PRStatus SetVirtualProcessors(PRIntn count=10);
friend class RCThread;
private:
/*
** None other than the runtime can create of destruct
** a primordial thread. It is fabricated by the runtime
** to wrap the thread that initiated the application.
*/
RCPrimordialThread();
~RCPrimordialThread();
void RootFunction();
}; /* RCPrimordialThread */
#endif /* defined(_RCTHREAD_H) */
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