// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of the License "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// e32\euser\epoc\x86\uc_exec.cia
// 
//

#define __GEN_USER_EXEC_CODE__

#include <e32svr.h>
#include <u32exec.h>


/******************************************************************************
* Slow executive calls with preprocessing or extra arguments
******************************************************************************/
__NAKED__ TInt Exec::SessionSend(TInt /*aHandle*/, TInt /*aFunction*/, TAny* /*aPtr*/, TRequestStatus* /*aStatus*/)
//
// Send a blind message to the server.
//
	{
	SLOW_EXEC4(EExecSessionSend);
	}

__NAKED__ TInt Exec::SessionSendSync(TInt /*aHandle*/, TInt /*aFunction*/, TAny* /*aPtr*/, TRequestStatus* /*aStatus*/)
//
// Send a blind message to the server using thread's dedicated message slot.
//
	{
	SLOW_EXEC4(EExecSessionSendSync);
	}

__NAKED__ TInt Exec::MessageIpcCopy(TInt /*aHandle*/, TInt /*aParam*/, SIpcCopyInfo& /*aInfo*/, TInt /*anOffset*/)
//
// IPC transfer using message handle
//
	{
	SLOW_EXEC4(EExecMessageIpcCopy);
	}

__NAKED__ TInt Exec::BTraceOut(TUint32 /*a0*/, TUint32 /*a1*/, const BTrace::SExecExtension& /*aExtension*/, TInt /*aDataSize*/)
	{
	SLOW_EXEC4(EExecBTraceOut);
	}

__NAKED__ TInt Exec::BTraceOutBig(TUint32 /*a0*/, TUint32 /*a1*/, const BTrace::SExecExtension& /*aExtension*/, TInt /*aDataSize*/)
	{
	SLOW_EXEC4(EExecBTraceOutBig);
	}

__NAKED__ TInt Exec::UTraceOut(TUint32 /*a0*/, TUint32 /*a1*/, const BTrace::SExecExtension& /*aExtension*/, TInt /*aDataSize*/)
	{
	SLOW_EXEC4(EExecUTraceOut);
	}

__NAKED__ void ExitCurrentThread(TExitType /*aType*/, TInt /*aReason*/, const TDesC8* /*aCategory*/)
	{
	asm("mov eax, %0": : "i"(EExecThreadKill));
	asm("push ebx");		// push these anyway for debug
	asm("push esi");
	asm("mov ecx, %0": : "i"(0xffff8001)); // gcc/gas doesnt like KCurrentThreadHandle
	asm("mov edx, [esp+12]");
	asm("mov ebx, [esp+16]");
	asm("mov esi, [esp+20]");
	asm("int 0x21");
	// doesn't return
	}

EXPORT_C __NAKED__ void RThread::RequestComplete(TRequestStatus*& aStatus, TInt aReason) const
/**
Signals this thread that an asynchronous request originating from this thread,
is complete.

The request is associated with the specified request status object supplied
by this thread.

Typically, the caller of this function is the service provider responsible
for satisfying the request made by this thread.

The request is completed with the completion code passed in aReason. This
value is copied into this thread's request status, *aStatus, before signalling
this thread's request semaphore.

The meaning of the completion code is a matter of convention to be decided
between the service provider and this thread.

In a client-server situation, completion of a request takes place in the context
of the server thread, but the pointer is interpreted in the address space
of the client.

It is often the case in client-server situations that the client and the server
are in the same address space (i.e. the same process).

Setting the pointer to the request status to NULL is a convenience, not all
servers need it.

@param aStatus A reference to a pointer to the request status originally
supplied by this thread. This is a pointer into this thread's
address space, which may be different to the thread currently
executing (this code). On return, the pointer to the request
status is set to NULL.

@param aReason The completion code of this request.
*/
//
// Signal a request completion.
// NOTE: __thiscall convention - we must remove parameters
//
	{
	THISCALL_PROLOG2()
	asm("push ebx");
	asm("mov ecx, [ecx]");
	asm("mov eax, [esp+8]");
	asm("mov ebx, [esp+12]");
	asm("xor edx, edx");
	asm("lock xchg edx, [eax]");
	asm("cmp edx, 0");
	asm("je ExecRequestComplete_ret");
	asm("mov [edx], ebx");   // write to request status
	asm("mov eax, %0": : "i"(EExecThreadRequestSignal));
	asm("int 0x21");
	asm("ExecRequestComplete_ret:");
	asm("pop ebx");
	THISCALL_EPILOG2()
	}