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Oops, missed adding a file
From: Ryan Kirkpatrick <rkirkpat@nag.cs.colorado.edu>
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65
src/backend/storage/buffer/s_lock.c
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65
src/backend/storage/buffer/s_lock.c
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/*-------------------------------------------------------------------------
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*
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* s_lock.c--
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* buffer manager interface routines
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.1 1997/12/30 04:03:01 scrappy Exp $
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*
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*-------------------------------------------------------------------------
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*/
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/*
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* S_LOCK() -- Implements the S_LOCK function for the Linux/Alpha platform.
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* This function is usually an inlined macro for all other platforms,
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* but must be a seperate function for the Linux/Alpha platform, due
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* to the assembly code involved.
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*/
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#if defined(__alpha__) && defined(linux)
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#include <sys/types.h>
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#include <sys/file.h>
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include <signal.h>
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#include "postgres.h"
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/* declarations split between these three files */
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#include "storage/buf.h"
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#include "storage/buf_internals.h"
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#include "storage/bufmgr.h"
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#include "storage/fd.h"
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#include "storage/ipc.h"
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#include "storage/s_lock.h"
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void S_LOCK(slock_t* lock)
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{
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do
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{
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slock_t _res;
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do
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{
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__asm__(" ldq $0, %0 \n\
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bne $0, already_set \n\
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ldq_l $0, %0 \n\
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bne $0, already_set \n\
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or $31, 1, $0 \n\
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stq_c $0, %0 \n\
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beq $0, stqc_fail \n\
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success: bis $31, $31, %1 \n\
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mb \n\
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jmp $31, end \n\
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stqc_fail: or $31, 1, $0 \n\
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already_set: bis $0, $0, %1 \n\
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end: nop ": "=m"(*lock), "=r"(_res): :"0");
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} while (_res != 0);
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} while (0);
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}
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#endif
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