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26 lines
1013 B
Groff
26 lines
1013 B
Groff
8 months ago
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.TH iob_init 3
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.SH NAME
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iob_init \- initialize new I/O batch
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.SH SYNTAX
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.B #include <libowfat/iob.h>
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int \fBiob_init\fP(io_batch* b,size_t hint_entries);
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.SH DESCRIPTION
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iob_init initializes \fI*b\fR with enough space allocated for
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\fIhint_entries\fR entries (buffers or files). This is purely a
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performance hint, if you are unsure just pass 1.
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You can add buffers, strings and files to an I/O batch and then send it
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all at once using iob_send.
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The benefit of the I/O batch API is that it exploits platform specific
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APIs like FreeBSD's sendfile. The file contents will always be sent in
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a way that allows the operating systems to perform zero copy TCP, and
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the buffers will always be sent using as few syscalls as possible and
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avoiding unnecessary copying (using writev).
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.SH "RETURN VALUE"
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iob_init returns 0 on success. If there was a memory allocation error,
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it returns -1 instead.
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.SH "SEE ALSO"
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iob_new(3), iob_init_autofree(3), iob_reset(3), iob_send(3), iob_addbuf(3), iob_adds_free(3), iob_addfile(3)
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