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File: [cvs.NetBSD.org] / src / lib / librumpclient / rumpclient.h (download)

Revision 1.15, Sun Jan 20 15:23:21 2013 UTC (7 years, 1 month ago) by pooka
Branch: MAIN
CVS Tags: yamt-pagecache-base9, yamt-pagecache-base8, tls-maxphys-base, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, localcount-20160914, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, agc-symver-base, agc-symver
Branch point for: prg-localcount2
Changes since 1.14: +6 -1 lines

Provide register_t compat on solarisa.
(would be nice to handle register_t compat internally instead, but the
interface was already exposed in a release)

/*	$NetBSD: rumpclient.h,v 1.15 2013/01/20 15:23:21 pooka Exp $	*/

/*-
 * Copyright (c) 2010 Antti Kantee.  All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#ifndef _RUMP_RUMPCLIENT_H_
#define _RUMP_RUMPCLIENT_H_

#include <sys/types.h>

#if !defined(__returns_twice)
#ifdef __GNUC__
#define __returns_twice __attribute__((__returns_twice__))
#else /* __GNUC__ */
#define __returns_twice
#endif /* !__GNUC__ */
#endif /* !__returns_twice */

#if defined(__sun__) && !defined(RUMP_REGISTER_T)
#define RUMP_REGISTER_T long
typedef RUMP_REGISTER_T register_t;
#endif

struct rumpclient_fork;

#define rumpclient_vfork() rumpclient__dofork(vfork)

#ifdef __BEGIN_DECLS
__BEGIN_DECLS
#elif defined(__cplusplus)
extern "C" {
#endif

int rumpclient_syscall(int, const void *, size_t, register_t *);
int rumpclient_init(void);

struct rumpclient_fork *rumpclient_prefork(void);
int			rumpclient_fork_init(struct rumpclient_fork *);
void			rumpclient_fork_cancel(struct rumpclient_fork *);
void			rumpclient_fork_vparent(struct rumpclient_fork *);

pid_t rumpclient_fork(void);
int rumpclient_exec(const char *, char *const [], char *const[]);
int rumpclient_daemon(int, int);

#define RUMPCLIENT_RETRYCONN_INFTIME ((time_t)-1)
#define RUMPCLIENT_RETRYCONN_ONCE ((time_t)-2)
#define RUMPCLIENT_RETRYCONN_DIE ((time_t)-3)
void rumpclient_setconnretry(time_t);

enum rumpclient_closevariant {
	RUMPCLIENT_CLOSE_CLOSE,
	RUMPCLIENT_CLOSE_DUP2,
	RUMPCLIENT_CLOSE_FCLOSEM
};
int rumpclient__closenotify(int *, enum rumpclient_closevariant);


/*
 * vfork needs to be implemented as an inline to make everything
 * run in the caller's stackframe.
 */
static __attribute__((__always_inline__)) __returns_twice inline pid_t
rumpclient__dofork(pid_t (*forkfn)(void))
{
	struct rumpclient_fork *rf;
	pid_t pid;
	int childran = 0;

	if (!(rf = rumpclient_prefork()))
		return -1;
                
	switch ((pid = forkfn())) {
	case -1:
		rumpclient_fork_cancel(rf);
		break;
	case 0:
		childran = 1;
		if (rumpclient_fork_init(rf) == -1)
			pid = -1;
		break;
	default:
		/* XXX: multithreaded vforker?  do they exist? */
		if (childran)
			rumpclient_fork_vparent(rf);
		break;
	}

	return pid;
}

#ifdef __END_DECLS
__END_DECLS
#elif defined(__cplusplus)
}
#endif

#endif /* _RUMP_RUMPCLIENT_H_ */