mirror of
https://github.com/reactos/reactos.git
synced 2024-10-30 03:27:31 +00:00
9ea495ba33
svn path=/branches/header-work/; revision=45691
167 lines
6.1 KiB
C
167 lines
6.1 KiB
C
/*
|
|
* PROJECT: ReactOS Kernel
|
|
* LICENSE: GPL - See COPYING in the top level directory
|
|
* FILE: ntoskrnl/include/internal/lpc_x.h
|
|
* PURPOSE: Internal Inlined Functions for Local Procedure Call
|
|
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
|
|
*/
|
|
|
|
//
|
|
// Gets the message type, removing the kernel-mode flag
|
|
//
|
|
#define LpcpGetMessageType(x) \
|
|
((x)->u2.s2.Type &~ LPC_KERNELMODE_MESSAGE)
|
|
|
|
//
|
|
// Waits on an LPC semaphore for a receive operation
|
|
//
|
|
#define LpcpReceiveWait(s, w) \
|
|
{ \
|
|
LPCTRACE(LPC_REPLY_DEBUG, "Wait: %p\n", s); \
|
|
Status = KeWaitForSingleObject(s, \
|
|
WrLpcReceive, \
|
|
w, \
|
|
FALSE, \
|
|
NULL); \
|
|
LPCTRACE(LPC_REPLY_DEBUG, "Wait done: %lx\n", Status); \
|
|
}
|
|
|
|
//
|
|
// Waits on an LPC semaphore for a reply operation
|
|
//
|
|
#define LpcpReplyWait(s, w) \
|
|
{ \
|
|
LPCTRACE(LPC_SEND_DEBUG, "Wait: %p\n", s); \
|
|
Status = KeWaitForSingleObject(s, \
|
|
WrLpcReply, \
|
|
w, \
|
|
FALSE, \
|
|
NULL); \
|
|
LPCTRACE(LPC_SEND_DEBUG, "Wait done: %lx\n", Status); \
|
|
if (Status == STATUS_USER_APC) \
|
|
{ \
|
|
/* We were preempted by an APC */ \
|
|
if (KeReadStateSemaphore(s)) \
|
|
{ \
|
|
/* It's still signaled, so wait on it */ \
|
|
KeWaitForSingleObject(s, \
|
|
WrExecutive, \
|
|
KernelMode, \
|
|
FALSE, \
|
|
NULL); \
|
|
Status = STATUS_SUCCESS; \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
//
|
|
// Waits on an LPC semaphore for a connect operation
|
|
//
|
|
#define LpcpConnectWait(s, w) \
|
|
{ \
|
|
LPCTRACE(LPC_CONNECT_DEBUG, "Wait: %p\n", s); \
|
|
Status = KeWaitForSingleObject(s, \
|
|
Executive, \
|
|
w, \
|
|
FALSE, \
|
|
NULL); \
|
|
LPCTRACE(LPC_CONNECT_DEBUG, "Wait done: %lx\n", Status);\
|
|
if (Status == STATUS_USER_APC) \
|
|
{ \
|
|
/* We were preempted by an APC */ \
|
|
if (KeReadStateSemaphore(s)) \
|
|
{ \
|
|
/* It's still signaled, so wait on it */ \
|
|
KeWaitForSingleObject(s, \
|
|
WrExecutive, \
|
|
KernelMode, \
|
|
FALSE, \
|
|
NULL); \
|
|
Status = STATUS_SUCCESS; \
|
|
} \
|
|
} \
|
|
}
|
|
|
|
//
|
|
// Releases an LPC Semaphore to complete a wait
|
|
//
|
|
#define LpcpCompleteWait(s) \
|
|
{ \
|
|
/* Release the semaphore */ \
|
|
LPCTRACE(LPC_SEND_DEBUG, "Release: %p\n", s); \
|
|
KeReleaseSemaphore(s, 1, 1, FALSE); \
|
|
}
|
|
|
|
//
|
|
// Allocates a new message
|
|
//
|
|
FORCEINLINE
|
|
PLPCP_MESSAGE
|
|
LpcpAllocateFromPortZone(VOID)
|
|
{
|
|
PLPCP_MESSAGE Message;
|
|
|
|
/* Allocate a message from the port zone while holding the lock */
|
|
KeAcquireGuardedMutex(&LpcpLock);
|
|
Message = ExAllocateFromPagedLookasideList(&LpcpMessagesLookaside);
|
|
if (!Message)
|
|
{
|
|
/* Fail, and let caller cleanup */
|
|
KeReleaseGuardedMutex(&LpcpLock);
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize it */
|
|
InitializeListHead(&Message->Entry);
|
|
Message->RepliedToThread = NULL;
|
|
Message->Request.u2.ZeroInit = 0;
|
|
|
|
/* Release the lock */
|
|
KeReleaseGuardedMutex(&LpcpLock);
|
|
return Message;
|
|
}
|
|
|
|
//
|
|
// Get the LPC Message associated to the Thread
|
|
//
|
|
FORCEINLINE
|
|
PLPCP_MESSAGE
|
|
LpcpGetMessageFromThread(IN PETHREAD Thread)
|
|
{
|
|
/* Check if the port flag is set */
|
|
if (((ULONG_PTR)Thread->LpcReplyMessage) & LPCP_THREAD_FLAG_IS_PORT)
|
|
{
|
|
/* The pointer is actually a port, not a message, so return NULL */
|
|
return NULL;
|
|
}
|
|
|
|
/* Otherwise, this is a message. Return the pointer */
|
|
return (PVOID)((ULONG_PTR)Thread->LpcReplyMessage & ~LPCP_THREAD_FLAGS);
|
|
}
|
|
|
|
FORCEINLINE
|
|
PLPCP_PORT_OBJECT
|
|
LpcpGetPortFromThread(IN PETHREAD Thread)
|
|
{
|
|
/* Check if the port flag is set */
|
|
if (((ULONG_PTR)Thread->LpcReplyMessage) & LPCP_THREAD_FLAG_IS_PORT)
|
|
{
|
|
/* The pointer is actually a port, return it */
|
|
return (PVOID)((ULONG_PTR)Thread->LpcWaitingOnPort &
|
|
~LPCP_THREAD_FLAGS);
|
|
}
|
|
|
|
/* Otherwise, this is a message. There is nothing to return */
|
|
return NULL;
|
|
}
|
|
|
|
FORCEINLINE
|
|
VOID
|
|
LpcpSetPortToThread(IN PETHREAD Thread,
|
|
IN PLPCP_PORT_OBJECT Port)
|
|
{
|
|
/* Set the port object */
|
|
Thread->LpcWaitingOnPort = (PVOID)(((ULONG_PTR)Port) |
|
|
LPCP_THREAD_FLAG_IS_PORT);
|
|
}
|