projects / thirdparty / bash.git / blame
| Commit | Line | Data |
|---|---|---|
| 3185942a JA |
1 | /* ufuncs - sleep and alarm functions that understand fractional values */ |
| 2 | ||
| 3 | /* Copyright (C) 2008,2009 Free Software Foundation, Inc. | |
| 4 | ||
| 5 | This file is part of GNU Bash, the Bourne Again SHell. | |
| 6 | ||
| 7 | Bash is free software: you can redistribute it and/or modify | |
| 8 | it under the terms of the GNU General Public License as published by | |
| 9 | the Free Software Foundation, either version 3 of the License, or | |
| 10 | (at your option) any later version. | |
| 11 | ||
| 12 | Bash is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | GNU General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU General Public License | |
| 18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | */ | |
| 20 | ||
| 21 | #include "config.h" | |
| 22 | ||
| 23 | #include "bashtypes.h" | |
| 24 | ||
| 25 | #if defined (TIME_WITH_SYS_TIME) | |
| 26 | # include <sys/time.h> | |
| 27 | # include <time.h> | |
| 28 | #else | |
| 29 | # if defined (HAVE_SYS_TIME_H) | |
| 30 | # include <sys/time.h> | |
| 31 | # else | |
| 32 | # include <time.h> | |
| 33 | # endif | |
| 34 | #endif | |
| 35 | ||
| 36 | #if defined (HAVE_UNISTD_H) | |
| 37 | #include <unistd.h> | |
| 38 | #endif | |
| 39 | ||
| a0c0a00f CR |
40 | #if defined (HAVE_SELECT) |
| 41 | # include "posixselect.h" | |
| 42 | #endif | |
| 43 | ||
| 3185942a JA |
44 | /* A version of `alarm' using setitimer if it's available. */ |
| 45 | ||
| 46 | #if defined (HAVE_SETITIMER) | |
| 47 | unsigned int | |
| 48 | falarm(secs, usecs) | |
| 49 | unsigned int secs, usecs; | |
| 50 | { | |
| 51 | struct itimerval it, oit; | |
| 52 | ||
| 53 | it.it_interval.tv_sec = 0; | |
| 54 | it.it_interval.tv_usec = 0; | |
| 55 | ||
| 56 | it.it_value.tv_sec = secs; | |
| 57 | it.it_value.tv_usec = usecs; | |
| 58 | ||
| 59 | if (setitimer(ITIMER_REAL, &it, &oit) < 0) | |
| 60 | return (-1); /* XXX will be converted to unsigned */ | |
| 61 | ||
| 62 | /* Backwards compatibility with alarm(3) */ | |
| 63 | if (oit.it_value.tv_usec) | |
| 64 | oit.it_value.tv_sec++; | |
| 65 | return (oit.it_value.tv_sec); | |
| 66 | } | |
| 67 | #else | |
| 68 | int | |
| 69 | falarm (secs, usecs) | |
| 70 | unsigned int secs, usecs; | |
| 71 | { | |
| 72 | if (secs == 0 && usecs == 0) | |
| 73 | return (alarm (0)); | |
| 74 | ||
| 75 | if (secs == 0 || usecs >= 500000) | |
| 76 | { | |
| 77 | secs++; | |
| 78 | usecs = 0; | |
| 79 | } | |
| 80 | return (alarm (secs)); | |
| 81 | } | |
| 82 | #endif /* !HAVE_SETITIMER */ | |
| 83 | ||
| 84 | /* A version of sleep using fractional seconds and select. I'd like to use | |
| 85 | `usleep', but it's already taken */ | |
| 86 | ||
| 87 | #if defined (HAVE_TIMEVAL) && defined (HAVE_SELECT) | |
| 88 | int | |
| 89 | fsleep(sec, usec) | |
| 90 | unsigned int sec, usec; | |
| 91 | { | |
| 92 | struct timeval tv; | |
| 93 | ||
| 94 | tv.tv_sec = sec; | |
| 95 | tv.tv_usec = usec; | |
| 96 | ||
| 97 | return select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &tv); | |
| 98 | } | |
| 99 | #else /* !HAVE_TIMEVAL || !HAVE_SELECT */ | |
| 100 | int | |
| 101 | fsleep(sec, usec) | |
| 102 | long sec, usec; | |
| 103 | { | |
| 104 | if (usec >= 500000) /* round */ | |
| 105 | sec++; | |
| 106 | return (sleep(sec)); | |
| 107 | } | |
| 108 | #endif /* !HAVE_TIMEVAL || !HAVE_SELECT */ |