osdSpin.c File Reference

#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include "errlog.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	checkStatus(status, message)

Typedefs
typedef struct epicsSpin	epicsSpin

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

Macro Definition Documentation

#define checkStatus	(		status,
			message
	)

Value:

if ((status)) { \
        errlogPrintf("epicsSpin %s failed: error %s\n", \
            (message), strerror((status))); \
    }

Definition at line 34 of file osdSpin.c.

Typedef Documentation

typedef struct epicsSpin epicsSpin

Function Documentation

epicsSpinId epicsSpinCreate

(

void

)

Definition at line 115 of file osdSpin.c.

                                  {
    epicsSpin *spin;
    int status;

    spin = calloc(1, sizeof(*spin));
    if (!spin)
        goto fail;

    status = pthread_mutex_init(&spin->lock, NULL);
    checkStatus(status, "pthread_mutex_init");
    if (status)
        goto fail;

    return spin;

fail:
    free(spin);
    return NULL;
}

void epicsSpinDestroy

(

epicsSpinId

spin

)

Definition at line 135 of file osdSpin.c.

                                        {
    int status;

    status = pthread_mutex_destroy(&spin->lock);
    checkStatus(status, "pthread_mutex_destroy");

    free(spin);
}

void epicsSpinLock

(

epicsSpinId

spin

)

Definition at line 144 of file osdSpin.c.

                                     {
    int status;

    status = pthread_mutex_lock(&spin->lock);
    checkStatus(status, "pthread_mutex_lock");
    if (status)
        cantProceed(NULL);
}

epicsSpinId epicsSpinMustCreate

(

void

)

Definition at line 173 of file osdSpin.c.

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

int epicsSpinTryLock

(

epicsSpinId

spin

)

Definition at line 153 of file osdSpin.c.

                                       {
    int status;

    status = pthread_mutex_trylock(&spin->lock);
    if (status == EBUSY)
        return 1;
    checkStatus(status, "pthread_mutex_trylock");
    return status;
}

void epicsSpinUnlock

(

epicsSpinId

spin

)

Definition at line 163 of file osdSpin.c.

                                       {
    int status;

    status = pthread_mutex_unlock(&spin->lock);
    checkStatus(status, "pthread_mutex_unlock");
}