arch-darwin.c

/*
	Copyright (c) 1999-2008, Phillip Stanley-Marbell (author)
 
	All rights reserved.

	Redistribution and use in source and binary forms, with or without 
	modification, are permitted provided that the following conditions
	are met:

	*	Redistributions of source code must retain the above
		copyright notice, this list of conditions and the following
		disclaimer.

	*	Redistributions in binary form must reproduce the above
		copyright notice, this list of conditions and the following
		disclaimer in the documentation and/or other materials
		provided with the distribution.

	*	Neither the name of the author nor the names of its
		contributors may be used to endorse or promote products
		derived from this software without specific prior written 
		permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
	COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
	LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
	CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
	ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
	POSSIBILITY OF SUCH DAMAGE.
*/

#include <stdio.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include "sf.h"
#include "mextern.h"

pthread_t	sched_handle;

int
mfsize(int fd)
{
	struct stat	sb;

	if (fstat(fd, &sb) < 0)
	{
		return -1;
	}

	return sb.st_size;
}

void
mstatelock(void)
{
}

void
mstateunlock(void)
{
}

void
marchinit(void)
{
}

char *
mfgets(char *buf, int len, int fd)
{
	int 	n, i = 0;
	char	ch;
	
	if (len <= 0)
	{
		return NULL;
	}

	do
	{
		n = mread(fd, &ch, 1);
		if (n == 0)
		{
			if (i == 0)
				return NULL;
			else
				break;
		}

		buf[i++] = ch;
	} while ((i < len) && (ch != '\n'));
	buf[i] = '\0';

	
	return buf;
}

void
mexit(Engine *E, char *str, int status)
{	
	printf("\n\n\tExiting: %s\n", str);
	printf("\tWriting all node information to sunflower.out\n\n");
	m_dumpall(E, E->logfilename, M_OWRITE, "Exit", "");

	exit(status);
}

void
mprintfd(int fd, char* buf)
{
	write(fd, buf, strlen(buf));

	return;
}

int
mcreate(char *path, int mode)
{
	int	perm = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
	int	flags = 0;
	int	rw = mode & (~M_OTRUNCATE);
	int	fd;

	if (rw == M_OREAD)
		flags = O_RDONLY;
	
	if (rw == M_OWRITE)
		flags = O_WRONLY;

	if (rw == (M_OREAD|M_OWRITE))
		flags = O_RDWR;

	if (mode & M_OTRUNCATE)
		flags |= O_TRUNC;
	else
		flags |= O_APPEND;

	fd = open(path, flags|O_CREAT, perm);
	return fd;
}

int
mopen(char *path, int mode)
{
	int	perm = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
	int	flags = 0;
	int	rw = mode & (~M_OTRUNCATE);


	if (rw == M_OREAD)
		flags = O_RDONLY;
	
	if (rw == M_OWRITE)
		flags = O_WRONLY;

	if (rw == (M_OREAD|M_OWRITE))
		flags = O_RDWR;

	if (mode & M_OTRUNCATE)
		flags |= O_TRUNC;
	else
		flags |= O_APPEND;

	return open(path, flags, perm);
}

int
mread(int fd, char* buf, int len)
{
	return read(fd, buf, len);
}

int
mclose(int fd)
{
	return close(fd);
}

int
mwrite(int fd, char* buf, int len)
{
	return write(fd, buf, len);
}

int
mspawnscheduler(Engine *E)
{
	int r = pthread_create(&E->sched_handle,\
				NULL, (void *)scheduler, E);

	if (r)
	{
		return -1;
	}
	
	return 0;
}

int
mkillscheduler(Engine *E)
{
	if (E->nodetach || !E->on)
	{
		return 0;
	}

	/*	Scheduler will exit cleanly when E->on is cleared	*/
	E->on = 0;

	return 0;
}

int
mchdir(char *path)
{
	return chdir(path);
}

char *
mgetpwd(void)
{
	/*								*/
	/*	This is non-POSIX, but...				*/
	/*	On Darwin, let getcwd() auto allocate space for buf	*/
	/*	The buffer will be freed by caller, e.g., sf.y.		*/
	/*								*/
	return getcwd(NULL, 0);
}

ulong
musercputimeusecs(void)
{
	struct rusage 	r;

	getrusage(RUSAGE_SELF, &r);

	return (ulong)(r.ru_utime.tv_sec*1E6 + r.ru_utime.tv_usec);
}

ulong
mcputimeusecs(void)
{
	struct rusage 	r;

	getrusage(RUSAGE_SELF, &r);

	return (ulong)(r.ru_utime.tv_sec*1E6 + r.ru_utime.tv_usec +
		       r.ru_stime.tv_sec*1E6 + r.ru_stime.tv_usec);
}

ulong
mwallclockusecs(void)
{
	struct timeval 	t;
	gettimeofday(&t, NULL);

	return t.tv_usec;
}

void
mlog(Engine *E, State *S, char *fmt, ...)
{
	char	*buf;
	va_list	arg;

	if (!SF_SIMLOG)
	{
		return;
	}

	/*	Should never happen, but just in case code changes elsewhere:	*/
	if (S->logfd < 0)
	{
		return;
	}

	buf = mcalloc(E, 1, MAX_MIO_BUFSZ, "(char *)buf in arch-darwin.c");
	if (buf == NULL)
	{
		mexit(E, "Could not allocate memory for (char *)buf in arch-darwin.c", -1);
	}

	va_start(arg, fmt);
	vsnprintf(buf, MAX_MIO_BUFSZ, fmt, arg);
	va_end(arg);

	write(S->logfd, buf, strlen(buf));
	mfree(E, buf, "(char *)buf in arch-darwin.c");

	return;
}

int
msnprint(char *dst, int size, char *fmt, ...)
{
	va_list		arg;
	int		n;

	va_start(arg, fmt);
	n = vsnprintf(dst, size, fmt, arg);
	va_end(arg);

	return n;
}

void
mprint(Engine *E, State *S, int out, char *fmt, ...)
{
	int	fmtlen;
	char	*buf;
	va_list	arg;


	if (!E->verbose && S != NULL)
	{
		return;
	}

	buf = mcalloc(E, 1, MAX_MIO_BUFSZ, "(char *)buf in arch-darwin.c/mprint");
	if (buf == NULL)
	{
		mexit(E, "Could not allocate memory for (char *)buf in arch-darwin.c/mprint", -1);
	}

	va_start(arg, fmt);
	fmtlen = vsnprintf(buf, MAX_MIO_BUFSZ, fmt, arg);
	va_end(arg);
 
	if (fmtlen < 0)
	{
		fprintf(stderr, "vsnprintf() in mprint() failed.\n");
		mfree(E, buf, "(char *)buf in arch-darwin.c/mprint");

		return;
	}

	/*	If no state structure is given, send to global output	*/
	if (S == NULL)
	{
		if (out != siminfo)
		{
			fprintf(stderr, "%s\n", Ebadsfout);
			mfree(E, buf, "(char *)buf in arch-darwin.c/mprint");

			return;
		}

		fprintf(stdout, "%s", buf);
		mfree(E, buf, "(char *)buf in arch-darwin.c/mprint");

		return;
	}

	if (out == nodestdout || out == nodestderr || out == nodeinfo)
	{
		if (S->NODE_ID == E->cp->NODE_ID)
		{
			fprintf(stdout, "%s", buf);
		}
	}
	else
	{
		fprintf(stderr, "%s\n", Ebadsfout);
	}

	mfree(E, buf, "(char *)buf in arch-darwin.c/mprint");

	return;
}

void
mnsleep(ulong nsecs)
{
	/*								*/
	/*	Inferno doesn't provide us with enough granularity.	*/
	/*	This should still be fairly portable since nanosleep	*/
	/*	is POSIX.1b.						*/
	/*								*/
	struct timespec rqtp;
	
	rqtp.tv_sec = nsecs/1000000000;
	rqtp.tv_nsec = nsecs % 1000000000;

	nanosleep(&rqtp, nil);
}

void
merror(Engine *E, char *fmt, ...)
{
	int	fmtlen;
	char	*buf;
	va_list	arg;


	buf = mcalloc(E, 1, MAX_MIO_BUFSZ, "(char *)buf in arch-darwin.c");
	if (buf == NULL)
	{
		mexit(E, "Could not allocate memory for (char *)buf in arch-darwin.c", -1);
	}

	va_start(arg, fmt);
	fmtlen = vsnprintf(buf, MAX_MIO_BUFSZ, fmt, arg);
	va_end(arg);
 
	if (fmtlen < 0)
	{
		fprintf(stderr, "mprint failed.\n");
		mfree(E, buf, "(char *)buf in arch-darwin.c");

		return;
	}

	mprint(E, NULL, siminfo, "Error: %s\n", buf);
	mfree(E, buf, "(char *)buf in arch-darwin.c");

	return;
}