121 lines
3.2 KiB
ArmAsm
121 lines
3.2 KiB
ArmAsm
|
// TITLE("Fast Event Pair Support")
|
|||
|
|
//++
|
|||
|
|
//
|
|||
|
|
// Copyright (c) 1992 Microsoft Corporation
|
|||
|
|
// Copyright (c) 1992 Digital Equipment Corporation
|
|||
|
|
//
|
|||
|
|
// Module Name:
|
|||
|
|
//
|
|||
|
|
// evpair.s
|
|||
|
|
//
|
|||
|
|
// Abstract:
|
|||
|
|
//
|
|||
|
|
// This module contains the implementation for the fast event pair
|
|||
|
|
// system services that are used for client/server synchronization.
|
|||
|
|
//
|
|||
|
|
// Author:
|
|||
|
|
//
|
|||
|
|
// David N. Cutler (davec) 1-Feb-1992
|
|||
|
|
//
|
|||
|
|
// Environment:
|
|||
|
|
//
|
|||
|
|
// Kernel mode.
|
|||
|
|
//
|
|||
|
|
// Revision History:
|
|||
|
|
//
|
|||
|
|
// Thomas Van Baak (tvb) 20-May-1992
|
|||
|
|
//
|
|||
|
|
// Adapted for Alpha AXP.
|
|||
|
|
//
|
|||
|
|
//--
|
|||
|
|
|
|||
|
|
#include "ksalpha.h"
|
|||
|
|
|
|||
|
|
SBTTL("Set Low Wait High Thread")
|
|||
|
|
//++
|
|||
|
|
//
|
|||
|
|
// NTSTATUS
|
|||
|
|
// NtSetLowWaitHighThread (
|
|||
|
|
// )
|
|||
|
|
//
|
|||
|
|
// Routine Description:
|
|||
|
|
//
|
|||
|
|
// This function uses the prereferenced client/server event pair pointer
|
|||
|
|
// and sets the low event of the event pair and waits on the high event
|
|||
|
|
// of the event pair object.
|
|||
|
|
//
|
|||
|
|
// N.B. This is a very heavily used service.
|
|||
|
|
//
|
|||
|
|
// Arguments:
|
|||
|
|
//
|
|||
|
|
// None.
|
|||
|
|
//
|
|||
|
|
// Return Value:
|
|||
|
|
//
|
|||
|
|
// STATUS_NO_EVENT_PAIR is returned if no event pair is associated with
|
|||
|
|
// the current thread. Otherwise, the status of the wait operation is
|
|||
|
|
// returned as the function value.
|
|||
|
|
//
|
|||
|
|
//
|
|||
|
|
//--
|
|||
|
|
|
|||
|
|
LEAF_ENTRY(NtSetLowWaitHighThread)
|
|||
|
|
|
|||
|
|
GET_CURRENT_THREAD // v0 = current thread
|
|||
|
|
|
|||
|
|
ldl a0, EtEventPair(v0) // get address of event pair object
|
|||
|
|
beq a0, 10f // if eq, no event pair associated
|
|||
|
|
addl a0, EpEventHigh, a1 // compute client event address
|
|||
|
|
addl a0, EpEventLow, a0 // comput server event address
|
|||
|
|
ldil a2, 1 // set user mode value
|
|||
|
|
br zero, KiSetServerWaitClientEvent // finish in wait code
|
|||
|
|
|
|||
|
|
10: ldil v0, STATUS_NO_EVENT_PAIR // set error status return value
|
|||
|
|
ret zero, (ra) // return
|
|||
|
|
|
|||
|
|
.end NtSetLowWaitHighThread
|
|||
|
|
|
|||
|
|
SBTTL("Set High Wait Low Thread")
|
|||
|
|
//++
|
|||
|
|
//
|
|||
|
|
// NTSTATUS
|
|||
|
|
// NtSetHighWaitLowThread (
|
|||
|
|
// )
|
|||
|
|
//
|
|||
|
|
// Routine Description:
|
|||
|
|
//
|
|||
|
|
// This function uses the prereferenced client/server event pair pointer
|
|||
|
|
// and sets the High event of the event pair and waits on the low event
|
|||
|
|
// of the event pair object.
|
|||
|
|
//
|
|||
|
|
// N.B. This is a very heavily used service.
|
|||
|
|
//
|
|||
|
|
// Arguments:
|
|||
|
|
//
|
|||
|
|
// None.
|
|||
|
|
//
|
|||
|
|
// Return Value:
|
|||
|
|
//
|
|||
|
|
// STATUS_NO_EVENT_PAIR is returned if no event pair is associated with
|
|||
|
|
// the current thread. Otherwise, the status of the wait operation is
|
|||
|
|
// returned as the function value.
|
|||
|
|
//
|
|||
|
|
//
|
|||
|
|
//--
|
|||
|
|
|
|||
|
|
LEAF_ENTRY(NtSetHighWaitLowThread)
|
|||
|
|
|
|||
|
|
GET_CURRENT_THREAD // v0 = current thread
|
|||
|
|
|
|||
|
|
ldl a0, EtEventPair(v0) // get address of event pair object
|
|||
|
|
beq a0, 10f // if eq, no event pair associated
|
|||
|
|
addl a0, EpEventLow, a1 // compute client event address
|
|||
|
|
addl a0, EpEventHigh, a0 // compute server event address
|
|||
|
|
ldil a2, 1 // set user mode value
|
|||
|
|
br zero, KiSetServerWaitClientEvent // finish in wait code
|
|||
|
|
|
|||
|
|
10: ldil v0, STATUS_NO_EVENT_PAIR // set error status return value
|
|||
|
|
ret zero, (ra) // return
|
|||
|
|
|
|||
|
|
.end NtSetHighWaitLowThread
|