mirror of
https://github.com/ruby/ruby.git
synced 2026-10-28 16:36:20 +08:00
Nobuyoshi Nakada
7d4461e162
Replace `tool/update-deps` with a Ruby source scanner so dependency updates no longer require GNU make, a configured build, or compiler preprocessor output. Keep compact source mappings and scanner declarations in dependency files, and expand complete rules into the build directory. Avoid the temporary fixture headers required by the compiler-driven prototype. Use the generated rules from GNU make, BSD make, and NMake builds. Support out-of-tree and read-only source trees, and retain expanded dependencies shipped in release archives when baseruby is unavailable.
141 lines
2.7 KiB
C
141 lines
2.7 KiB
C
#include "ruby/internal/config.h"
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#define rb_notimplement() (errno = EINVAL)
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#if defined _WIN32
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#elif defined __wasi__
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#include <errno.h>
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int
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flock(int fd, int operation)
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{
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errno = EINVAL;
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return -1;
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}
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#elif defined HAVE_FCNTL && defined HAVE_FCNTL_H
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/* These are the flock() constants. Since this systems doesn't have
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flock(), the values of the constants are probably not available.
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*/
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# ifndef LOCK_SH
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# define LOCK_SH 1
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# endif
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# ifndef LOCK_EX
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# define LOCK_EX 2
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# endif
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# ifndef LOCK_NB
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# define LOCK_NB 4
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# endif
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# ifndef LOCK_UN
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# define LOCK_UN 8
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# endif
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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int
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flock(int fd, int operation)
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{
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struct flock lock;
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switch (operation & ~LOCK_NB) {
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case LOCK_SH:
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lock.l_type = F_RDLCK;
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break;
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case LOCK_EX:
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lock.l_type = F_WRLCK;
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break;
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case LOCK_UN:
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lock.l_type = F_UNLCK;
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break;
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default:
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errno = EINVAL;
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return -1;
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}
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lock.l_whence = SEEK_SET;
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lock.l_start = lock.l_len = 0L;
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return fcntl(fd, (operation & LOCK_NB) ? F_SETLK : F_SETLKW, &lock);
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}
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#elif defined(HAVE_LOCKF)
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#include <unistd.h>
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#include <errno.h>
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/* Emulate flock() with lockf() or fcntl(). This is just to increase
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portability of scripts. The calls might not be completely
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interchangeable. What's really needed is a good file
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locking module.
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*/
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# ifndef F_ULOCK
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# define F_ULOCK 0 /* Unlock a previously locked region */
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# endif
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# ifndef F_LOCK
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# define F_LOCK 1 /* Lock a region for exclusive use */
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# endif
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# ifndef F_TLOCK
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# define F_TLOCK 2 /* Test and lock a region for exclusive use */
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# endif
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# ifndef F_TEST
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# define F_TEST 3 /* Test a region for other processes locks */
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# endif
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/* These are the flock() constants. Since this systems doesn't have
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flock(), the values of the constants are probably not available.
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*/
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# ifndef LOCK_SH
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# define LOCK_SH 1
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# endif
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# ifndef LOCK_EX
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# define LOCK_EX 2
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# endif
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# ifndef LOCK_NB
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# define LOCK_NB 4
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# endif
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# ifndef LOCK_UN
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# define LOCK_UN 8
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# endif
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int
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flock(int fd, int operation)
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{
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switch (operation) {
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/* LOCK_SH - get a shared lock */
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case LOCK_SH:
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rb_notimplement();
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return -1;
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/* LOCK_EX - get an exclusive lock */
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case LOCK_EX:
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return lockf (fd, F_LOCK, 0);
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/* LOCK_SH|LOCK_NB - get a non-blocking shared lock */
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case LOCK_SH|LOCK_NB:
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rb_notimplement();
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return -1;
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/* LOCK_EX|LOCK_NB - get a non-blocking exclusive lock */
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case LOCK_EX|LOCK_NB:
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return lockf (fd, F_TLOCK, 0);
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/* LOCK_UN - unlock */
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case LOCK_UN:
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return lockf (fd, F_ULOCK, 0);
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/* Default - can't decipher operation */
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default:
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errno = EINVAL;
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return -1;
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}
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}
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#else
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int
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flock(int fd, int operation)
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{
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rb_notimplement();
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return -1;
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}
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#endif
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