Open System Services System Calls Reference Manual (G06.28+)

System Functions (s and S) spt_vfprintfx(2)
NAME
spt_vfprintfx - Formats a variable number of parameters for output (thread-aware version)
LIBRARY
G-series native OSS processes: /G/system/sysnn/zsptsrl
H-series OSS processes: /G/system/zdllnnn/zsptdll
SYNOPSIS
[#include <stdarg.h>]
[#include <stdio.h>]
#include <spthread.h>
int spt_vfprintfx (
FILE *stream,
const char *format,
va_list printarg
);
PARAMETERS
stream Specifies the output stream.
format Specifies a character string that contains two types of objects:
• Plain characters, which are copied to the output stream.
• Conversion specifications, each of which causes zero or
more items to be fetched from the stdarg parameter
lists.
printarg Specifies the parameters to be printed.
DESCRIPTION
The spt_vfprintfx() function is the thread-aware version of the vfprintf( ) function.
The spt_vfprintfx() function formats and writes stdarg parameter lists.
This function is the same as the spt_fprintfx() function, except that it is not called with a vari-
able number of parameters. Instead, it is called with a parameter list pointer as defined by stdarg.
NOTES
The macro to map vfprintf() to spt_vfprintfx( ) is available in C applications when
SPT_THREAD_AWARE_NONBLOCK has been defined in the following manner before
including spthread.h:
#define SPT_THREAD_AWARE_NONBLOCK
The alias to link vfprintf() to spt_vfprintfx( ) is available in C++ applications when
SPT_THREAD_AWARE_PRAGMA_NONBLOCK has been defined in the following manner
before including spthread.h:
#define SPT_THREAD_AWARE_PRAGMA_NONBLOCK
EXAMPLES
The following example demonstrates how the spt_vfprintfx() function can be used to write an
error routine:
#include <stdarg.h>
#include <stdio.h>
#define SPT_THREAD_AWARE_NONBLOCK
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