osdSpin.c File Reference

#include <stdlib.h>
#include <rtems.h>
#include "cantProceed.h"
#include "epicsSpin.h"

Include dependency graph for osdSpin.c:

Go to the source code of this file.

Classes
struct	epicsSpin

Macros
#define	__RTEMS_VIOLATE_KERNEL_VISIBILITY__   1

Typedefs
typedef struct epicsSpin	epicsSpin

Functions
epicsSpinId	epicsSpinCreate (void)
epicsSpinId	epicsSpinMustCreate (void)
void	epicsSpinDestroy (epicsSpinId spin)
void	epicsSpinLock (epicsSpinId spin)
int	epicsSpinTryLock (epicsSpinId spin)
void	epicsSpinUnlock (epicsSpinId spin)

Macro Definition Documentation

#define __RTEMS_VIOLATE_KERNEL_VISIBILITY__   1

Definition at line 29 of file osdSpin.c.

Typedef Documentation

typedef struct epicsSpin epicsSpin

Function Documentation

epicsSpinId epicsSpinCreate

(

void

)

Definition at line 42 of file osdSpin.c.

                                  {
    return calloc(1, sizeof(epicsSpin));
}

void epicsSpinDestroy

(

epicsSpinId

spin

)

Definition at line 54 of file osdSpin.c.

                                        {
    free(spin);
}

void epicsSpinLock

(

epicsSpinId

spin

)

Definition at line 58 of file osdSpin.c.

                                     {
    rtems_interrupt_level level;

    rtems_interrupt_disable(level);
    _Thread_Disable_dispatch();
    if (spin->locked) {
        rtems_interrupt_enable(level);
        _Thread_Enable_dispatch();
        if (!rtems_interrupt_is_in_progress()) {
            printk("epicsSpinLock(%p): Deadlock.\n", spin);
            cantProceed("Recursive lock, missed unlock or block when locked.");
        }
        else {
            printk("epicsSpinLock(%p): Deadlock in ISR.\n"
                "Recursive lock, missed unlock or block when locked.\n",
                spin);
        }
        return;
    }
    spin->level = level;
    spin->locked = 1;
}

epicsSpinId epicsSpinMustCreate

(

void

)

Definition at line 46 of file osdSpin.c.

{
    epicsSpinId ret = epicsSpinCreate();
    if (!ret)
        cantProceed("epicsSpinMustCreate: epicsSpinCreate failed.");
    return ret;
}

int epicsSpinTryLock

(

epicsSpinId

spin

)

Definition at line 81 of file osdSpin.c.

                                       {
    rtems_interrupt_level level;

    rtems_interrupt_disable(level);
    _Thread_Disable_dispatch();
    if (spin->locked) {
        rtems_interrupt_enable(level);
        _Thread_Enable_dispatch();
        return 1;
    }
    spin->level = level;
    spin->locked = 1;
    return 0;
}

void epicsSpinUnlock

(

epicsSpinId

spin

)

Definition at line 96 of file osdSpin.c.

                                       {
    rtems_interrupt_level level = spin->level;

    if (!spin->locked) {
        printk("epicsSpinUnlock(%p): not locked\n", spin);
        return;
    }
    spin->level = spin->locked = 0;
    rtems_interrupt_enable (level);
    _Thread_Enable_dispatch();
}