osdSpin.c File Reference

#include <stdlib.h>
#include <intLib.h>
#include <logLib.h>
#include <taskLib.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	_VSB_CONFIG_FILE   <../lib/h/config/vsbConfig.h>

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 _VSB_CONFIG_FILE   <../lib/h/config/vsbConfig.h>

Definition at line 32 of file osdSpin.c.

Typedef Documentation

typedef struct epicsSpin epicsSpin

Function Documentation

epicsSpinId epicsSpinCreate

(

void

)

Definition at line 47 of file osdSpin.c.

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

void epicsSpinDestroy

(

epicsSpinId

spin

)

Definition at line 59 of file osdSpin.c.

                                        {
    free(spin);
}

void epicsSpinLock

(

epicsSpinId

spin

)

Definition at line 63 of file osdSpin.c.

                                     {
    int key = intLock();

    if (!intContext())
        taskLock();
    if (spin->locked) {
        intUnlock(key);
        if (!intContext()) {
            taskUnlock();
            logMsg("epicsSpinLock(%p): Deadlock.\n",
                (int) spin, 0, 0, 0, 0, 0);
            cantProceed("Recursive lock, missed unlock or block when locked.");
        }
        else {
            logMsg("epicsSpinLock(%p): Deadlock in ISR.\n"
                "Recursive lock, missed unlock or block when locked.\n",
                (int) spin, 0, 0, 0, 0, 0);
        }
        return;
    }
    spin->key = key;
    spin->locked = 1;
}

epicsSpinId epicsSpinMustCreate

(

void

)

Definition at line 51 of file osdSpin.c.

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

int epicsSpinTryLock

(

epicsSpinId

spin

)

Definition at line 87 of file osdSpin.c.

                                       {
    int key = intLock();

    if (!intContext())
        taskLock();
    if (spin->locked) {
        intUnlock(key);
        if (!intContext())
            taskUnlock();
        return 1;
    }
    spin->key = key;
    spin->locked = 1;
    return 0;
}

void epicsSpinUnlock

(

epicsSpinId

spin

)

Definition at line 103 of file osdSpin.c.

                                       {
    int key = spin->key;

    if (!spin->locked) {
        logMsg("epicsSpinUnlock(%p): not locked\n",
            (int) spin, 0, 0, 0, 0, 0);
        return;
    }
    spin->key = spin->locked = 0;
    intUnlock(key);
    if (!intContext())
        taskUnlock();
}