Socket_Writev (changes)
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» SWI Calls
» Socket_Writev
Socket_Writev
(SWI &41217)
| Entry | |
|---|---|
| R0 | Socket descriptor |
| R1 | Pointer to an array of buffer descriptors |
| R2 | Number of buffer descriptors |
| Exit | |
|---|---|
| R0 | Number of bytes sent |
Use
The purpose of this call is to write data to a socket from a vector of buffer descriptors. It is equivalent to calling write() except in the way the buffers need not be contiguous.
Berkeley sockets equivalence
This SWI directly corresponds to the function writev and would ordinarily be called from C using the socketwritev() function in socklib.h.
Notes
The different function name is needed because in RISC OS file descriptors and socket descriptors come from two different number spaces, while under Unix they share the same number space so a single writev() function serves to write to either type.
See also
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