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* gmon/gmon.c: Remove advertising clause of copyright. * gmon/mcount.c: Likewise. * gmon/sys/gmon.h: Likewise. * inet/arpa/ftp.h: Likewise. * inet/arpa/telnet.h: Likewise. * inet/arpa/tftp.h: Likewise. * inet/inet_lnaof.c: Likewise. * inet/inet_mkadr.c: Likewise. * inet/inet_net.c: Likewise. * inet/inet_netof.c: Likewise. * inet/protocols/routed.h: Likewise. * inet/protocols/rwhod.h: Likewise. * inet/protocols/talkd.h: Likewise. * inet/protocols/timed.h: Likewise. * inet/rcmd.c: Likewise. * inet/rexec.c: Likewise. * inet/ruserpass.c: Likewise. * io/fts.c: Likewise. * io/fts.h: Likewise. * login/login_tty.c: Likewise. * misc/fstab.h: Likewise. * misc/getttyent.c: Likewise. * misc/getusershell.c: Likewise. * misc/sys/queue.h: Likewise. * misc/sys/syslog.h: Likewise. * misc/syslog.c: Likewise. * misc/ttyent.h: Likewise. * misc/ttyslot.c: Likewise. * resolv/arpa/nameser.h: Likewise. * resolv/gethnamaddr.c: Likewise. * resolv/herror.c: Likewise. * resolv/inet_addr.c: Likewise. * resolv/mapv4v6addr.h: Likewise. * resolv/mapv4v6hostent.h: Likewise * resolv/nss_dns/dns-host.c: Likewise. * resolv/nss_dns/dns-network.c: Likewise. * resolv/res_comp.c: Likewise. * resolv/res_data.c: Likewise. * resolv/res_debug.c: Likewise. * resolv/res_init.c: Likewise. * resolv/res_mkquery.c: Likewise. * resolv/res_query.c: Likewise. * resolv/res_send.c: Likewise. * resolv/resolv.h: Likewise. * sysdeps/generic/div.c: Likewise. * sysdeps/generic/netinet/ip.h: Likewise. * sysdeps/generic/netinet/tcp.h: Likewise. * sysdeps/generic/paths.h: Likewise. * sysdeps/generic/prof-freq.c: Likewise. * sysdeps/generic/sys/ttydefaults.h: Likewise. * sysdeps/gnu/netinet/ip_icmp.h: Likewise. * sysdeps/gnu/netinet/tcp.h: Likewise. * sysdeps/ieee754/support.c: Likewise. * sysdeps/mach/hurd/sys/param.h: Likewise. * sysdeps/unix/bsd/bsd4.4/bits/errno.h: Likewise. * sysdeps/unix/bsd/bsd4.4/bits/ioctls.h: Likewise. * sysdeps/unix/bsd/sun/sunos4/sys/ttydefaults.h: Likewise. * sysdeps/unix/bsd/sys/reboot.h: Likewise. * sysdeps/unix/sysv/linux/netinet/if_ether.h: Likewise. * sysdeps/unix/sysv/linux/netinet/igmp.h: Likewise. * sysdeps/unix/sysv/linux/netinet/ip.h: Likewise. * sysdeps/unix/sysv/linux/paths.h: Likewise. * sysdeps/unix/sysv/linux/sys/quota.h: Likewise. * sysdeps/unix/sysv/linux/sys/ttydefaults.h: Likewise. * sysdeps/vax/DEFS.h: Likewise. * termios/sys/ttychars.h: Likewise. * misc/daemon.c: Likewise. Call fork.
54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/* Return frequency of ticks reported by profil. Generic version. */
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/*-
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* Copyright (c) 1983, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/time.h>
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int
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__profile_frequency (void)
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{
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/*
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* Discover the tick frequency of the machine if something goes wrong,
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* we return 0, an impossible hertz.
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*/
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struct itimerval tim;
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tim.it_interval.tv_sec = 0;
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tim.it_interval.tv_usec = 1;
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tim.it_value.tv_sec = 0;
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tim.it_value.tv_usec = 0;
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__setitimer(ITIMER_REAL, &tim, 0);
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__setitimer(ITIMER_REAL, 0, &tim);
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if (tim.it_interval.tv_usec < 2)
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return 0;
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return (1000000 / tim.it_interval.tv_usec);
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}
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