/* $Id: global.c,v 1.10 2003/08/19 13:37:08 mikpe Exp $

 * Library interface to global-mode performance counters.

 *

 * Copyright (C) 1999-2003  Mikael Pettersson

 */

#include <stdlib.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include <fcntl.h>

#include "libperfctr.h"

#include "marshal.h"

struct gperfctr {	/* XXX: kill this struct */

    int fd;

};

struct gperfctr *gperfctr_open(void)

{

    struct gperfctr *gperfctr;

    gperfctr = malloc(sizeof(*gperfctr));

    if( gperfctr ) {

	gperfctr->fd = open("/dev/perfctr", O_RDONLY);

	if( gperfctr->fd >= 0 ) {

	    if( perfctr_abi_check_fd(gperfctr->fd) >= 0 )

		return gperfctr;

	    close(gperfctr->fd);

	}

	free(gperfctr);

    }

    return NULL;

}

void gperfctr_close(struct gperfctr *gperfctr)

{

    close(gperfctr->fd);

    free(gperfctr);

}

int gperfctr_control(const struct gperfctr *gperfctr,

		     struct gperfctr_cpu_control *arg)

{

    return perfctr_ioctl_w(gperfctr->fd, GPERFCTR_CONTROL, arg,

			   &gperfctr_cpu_control_sdesc);

}

int gperfctr_read(const struct gperfctr *gperfctr, struct gperfctr_cpu_state *arg)

{

    return perfctr_ioctl_wr(gperfctr->fd, GPERFCTR_READ, arg,

			    &gperfctr_cpu_state_only_cpu_sdesc,

			    &gperfctr_cpu_state_sdesc);

}

int gperfctr_stop(const struct gperfctr *gperfctr)

{

    return ioctl(gperfctr->fd, GPERFCTR_STOP, 0);

}

int gperfctr_start(const struct gperfctr *gperfctr, unsigned int interval_usec)

{

    return ioctl(gperfctr->fd, GPERFCTR_START, interval_usec);

}

int gperfctr_info(const struct gperfctr *gperfctr, struct perfctr_info *info)

{

    return perfctr_info(gperfctr->fd, info);

}

struct perfctr_cpus_info *gperfctr_cpus_info(const struct gperfctr *gperfctr)

{

    return perfctr_cpus_info(gperfctr->fd);

}