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Document functions xmemdupz(), xread() and xwrite()

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Signed-off-by: Heikki Orsila <heikki.orsila@iki.fi>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Heikki Orsila 2008-04-27 12:48:30 +03:00 committed by Junio C Hamano
parent 633d1fe9d0
commit e8729f5380
1 changed files with 16 additions and 0 deletions
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16
git-compat-util.h
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@ -268,6 +268,12 @@ static inline void *xmalloc(size_t size)
return ret;
}
/*
* xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
* "data" to the allocated memory, zero terminates the allocated memory,
* and returns a pointer to the allocated memory. If the allocation fails,
* the program dies.
*/
static inline void *xmemdupz(const void *data, size_t len)
{
char *p = xmalloc(len + 1);
@ -329,6 +335,11 @@ static inline void *xmmap(void *start, size_t length,
return ret;
}
/*
* xread() is the same a read(), but it automatically restarts read()
* operations with a recoverable error (EAGAIN and EINTR). xread()
* DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
*/
static inline ssize_t xread(int fd, void *buf, size_t len)
{
ssize_t nr;
@ -340,6 +351,11 @@ static inline ssize_t xread(int fd, void *buf, size_t len)
}
}
/*
* xwrite() is the same a write(), but it automatically restarts write()
* operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
* GUARANTEE that "len" bytes is written even if the operation is successful.
*/
static inline ssize_t xwrite(int fd, const void *buf, size_t len)
{
ssize_t nr;