Open System Services System Calls Reference Manual (G06.25+, H06.03+)

spt_writev(2) OSS System Calls Reference Manual
NAME
spt_writev - Initiate thread-aware writev( ) function
LIBRARY
G-series native OSS processes: /G/system/sysnn/zsptsrl
H-series OSS processes: /G/system/zdllnnn/zsptdll
SYNOPSIS
#include <spthread.h>
ssize_t spt_writev(
int filedes,
struct iovec *iov,
int iov_count);
PARAMETERS
See the writev(2) reference page.
DESCRIPTION
This is a thread-aware version of the writev() function. The file descriptor must be nonblocking
for this function to be thread-aware.
The following macro maps spt_writev() to writev( ) and has been defined in spthread.h:
#define writev(filedes, iov, iov_count) \
spt_writev((filedes), (iov), (iov_count))
This macro is available only when SPT_THREAD_AWARE has been defined before including
spthread.h, as follows:
#define SPT_THREAD_AWARE
RETURN VALUES
See the writev(2) reference page. The following also applies:
• The value of errno is never set to [EWOULDBLOCK] or [EAGAIN].
• If the file descriptor becomes invalid (is closed by another thread), -1 is
returned with an errno value of [EBADF].
• If a signal is received via the pthread_kill() function and is not blocked,
ignored, or handled, -1 is returned with an errno value of [EINTR].
STANDARDS CONFORMANCE
This function is an extension to the XPG4 Version 2 specification. Interfaces documented on this
reference page conform to the following industry standards:
• IEEE Std 1003.1c-1995, POSIX System Application Program Interface
The use of the header file spthread.h is an HP exception to the POSIX standard.
7−158 Hewlett-Packard Company 527186-003