irq_arch_common.h File Reference

Implementation of the kernels irq interface. More...

Detailed Description

Implementation of the kernels irq interface.

Author

Gunar Schorcht gunar.nosp@m.@sch.nosp@m.orcht.nosp@m..net

Definition in file irq_arch_common.h.

#include "irq.h"
#include "sched.h"
#include "thread.h"

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Variables
volatile uint32_t	irq_interrupt_nesting
	Indicates the interrupt nesting depth. More...

Macros to enter and exit an ISR
Since all the stuff is done in _frxt_int_enter and _frxt_int_exit, these macros are doing nothing and are kept only for source code compatibility.
#define	irq_isr_enter()
#define	irq_isr_exit()

Macros to enter and exit a critical region
Note : since they use a local variable they can be used only in same function
#define	critical_enter()   int _irq_state = irq_disable()
#define	critical_exit()   irq_restore(_irq_state)

Macros to enter and exit a critical region with state variable
#define	critical_enter_var(m)   m = irq_disable()
#define	critical_exit_var(m)   irq_restore(m)

Variable Documentation

irq_interrupt_nesting

volatile uint32_t irq_interrupt_nesting

extern

Indicates the interrupt nesting depth.

The variable is incremented on entry into and decremented on exit from an ISR.