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\ ")

Function Documentation

__asm__() [1/2]

__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__() [2/2]

__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().

atomic_dec()

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

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().