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64 lines
960 B
64 lines
960 B
/**
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* Author......: See docs/credits.txt
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* License.....: MIT
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*/
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#include "common.h"
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#include "types.h"
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#include "locking.h"
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#include "shared.h"
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#if defined (F_SETLKW)
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int hc_lockfile (HCFILE *fp)
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{
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if (fp == NULL) return -1;
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struct flock lock;
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memset (&lock, 0, sizeof (struct flock));
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lock.l_type = F_WRLCK;
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/* Needs this loop because a signal may interrupt a wait for lock */
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while (fcntl (fp->fd, F_SETLKW, &lock))
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{
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if (errno != EINTR) return -1;
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}
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return 0;
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}
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int hc_unlockfile (HCFILE *fp)
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{
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if (fp == NULL) return -1;
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struct flock lock;
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memset (&lock, 0, sizeof (struct flock));
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lock.l_type = F_UNLCK;
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if (fcntl (fp->fd, F_SETLK, &lock)) return -1;
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return 0;
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}
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#else
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int hc_lockfile (MAYBE_UNUSED HCFILE *fp)
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{
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// we should put windows specific code here
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return 0;
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}
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int hc_unlockfile (MAYBE_UNUSED HCFILE *fp)
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{
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// we should put windows specific code here
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return 0;
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}
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#endif // F_SETLKW
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