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110 lines
2.6 KiB
110 lines
2.6 KiB
title "Resource package x86 optimzations"
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;++
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;
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;Copyright (c) 1991 Microsoft Corporation
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;
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;Module Name:
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;
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; resoura.asm
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;
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;Abstract:
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;
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; Optimized preambles for some HOT resource code paths.
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;
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; Takes first crack at satisfying the ExResource API, if it
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; can't it passes it onto the full blown API.
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;
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; Optimized for UP free builds only!
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;
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;Author:
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;
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; Ken Reneris (kenr) 13-Jan-1992
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;
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;Revision History:
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;
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;--
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.386p
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include ks386.inc
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include callconv.inc ; calling convention macros
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include mac386.inc
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EXTRNP _ExpReleaseResourceForThread,2
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ExculsiveWaiter equ 1 ; From ddkresrc.c
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SharedWaiter equ 2 ; From ddkresrc.c
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AnyWaiter equ (ExculsiveWaiter+SharedWaiter)
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_TEXT$00 SEGMENT PARA PUBLIC 'CODE'
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ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
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ifdef NT_UP
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ife DBG
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;++
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;
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; VOID
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; ExReleaseResourceForThread(
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; IN PNTDDK_ERESOURCE Resource,
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; IN ERESOURCE_THREAD OurThread
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; )
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;
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;
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; Routine Description:
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;
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; This routine release the input resource the indcated thread. The
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; resource can have been acquired for either shared or exclusive access.
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;
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; Arguments:
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;
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; Resource - Supplies the resource to release
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;
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; Thread - Supplies the thread that originally acquired the resource
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;
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; Return Value:
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;
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; None.
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;
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;--
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cPublicProc _ExReleaseResourceForThread,2
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cPublicFpo 2,0
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mov ecx, [esp+4] ; resource
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mov eax, [esp+8] ; our thread
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cli
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test byte ptr [ecx].RsFlag, AnyWaiter ; any waiter?
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jnz short rrt_longway_ddk ; yes, go long
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test byte ptr [ecx].RsFlag, RsOwnedExclusive ; exclusive?
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jz short rrt_longway_ddk ; bad release, go abort
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mov edx, [ecx].RsOwnerThreads ; (edx) = ownerthread table
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cmp [edx], eax ; our thread at table[0]?
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jne short rrt_longway_ddk ; bad release, go abort
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mov eax, [ecx].RsOwnerCounts
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dec byte ptr [eax] ; thread count -= 1
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jnz short rrt_exit_ddk ; if not zero, all done
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mov dword ptr [edx], 0 ; clear thread table[0]
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dec word ptr [ecx].RsActiveCount ; resource count -= 1
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and byte ptr [ecx].RsFlag, not RsOwnedExclusive
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rrt_exit_ddk:
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sti
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stdRET _ExReleaseResourceForThread
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rrt_longway_ddk:
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sti
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jmp _ExpReleaseResourceForThread@8
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stdENDP _ExReleaseResourceForThread
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endif
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endif
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_TEXT$00 ends
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end
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