atomic.c File Reference

#include "config.h"
#include <atomic.h>

Include dependency graph for atomic.c:

Go to the source code of this file.

Functions
void	atomic_inc (atomic_t *counter)
	increment atomic counter without interruption.
	__asm__ ("\n\ .text\n\ .globl _atomic_inc\n\ _atomic_inc:\n\ stc ccr, r1h ; save flags\n\ orc #0x80, ccr ; disable all but NMI\n\ mov.b @r0, r1l\n\ inc r1l\n\ mov.b r1l, @r0\n\ ldc r1h, ccr ; restore flags\n\ rts\n\ ")
void	atomic_dec (atomic_t *counter)
	decrement atomic counter without interruption.
	__asm__ ("\n\ .text\n\ .globl _atomic_dec\n\ _atomic_dec:\n\ stc ccr, r1h\n\ orc #0x80, ccr\n\ mov.b @r0, r1l\n\ dec r1l\n\ mov.b r1l, @r0\n\ ldc r1h, ccr\n\ rts\n\ ")

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Function Documentation

__asm__ (  "\n\.text\n\.globl _atomic_dec\n\ _atomic_dec:\n\ stc   ccr, r1h\n\orc#  0x80, ccr\n\mov.b @  r0, r1l\n\dec r1l\n\mov.b  r1l, @r0\n\ldc  r1h, ccr\n\rts\n\"  )

__asm__ (  "\n\.text\n\.globl _atomic_inc\n\ _atomic_inc:\n\ stc   ccr, r1h;save flags\n\orc#  0x80, ccr;disable all but NMI\n\mov.b @  r0, r1l\n\inc r1l\n\mov.b  r1l, @r0\n\ldc  r1h, ccr;restore flags\n\rts\n\"  )

Referenced by dbutton(), disable_irqs(), enable_irqs(), lcd_clear(), lcd_hide(), lcd_show(), power_init(), power_off(), sound_playing(), and sound_system().

void atomic_dec (  atomic_t *  counter  )

decrement atomic counter without interruption. locks interrupts except NMI, decrements count then restores interrupts. Parameters: counter  the counter resource to be decremented See also: atomic_inc

void atomic_inc (  atomic_t *  counter  )

increment atomic counter without interruption. locks interrupts except NMI, increments count then restores interrupts. Parameters: counter  the counter resource to be incremented See also: atomic_dec Referenced by sem_post().

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brickOS is released under the Mozilla Public License. Original code copyright 1998-2005 by the authors.

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