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#ifndef _PRINT_C_ /* -*- linux-c -*- */
#define _PRINT_C_
#include <linux/config.h>
#include <stdio.h>
/** @file print.c
* @addtogroup print Print Buffer
* Print Buffer Functions.
* The print buffer is for collecting output to send to the user daemon.
* This is a per-cpu static buffer. The buffer is sent when
* _stp_print_flush() is called.
*
* The reason to do this is to allow multiple small prints to be combined then
* timestamped and sent together to stpd. It could flush automatically on newlines,
* but what about stack traces which span many lines? So try this and see how it works for us.
* @{
*/
/** Size of buffer, not including terminating NULL */
#ifndef STP_PRINT_BUF_LEN
#define STP_PRINT_BUF_LEN 8000
#endif
#include "string.h"
static int _stp_pbuf_len[NR_CPUS];
#define STP_PRINT_BUF_START 0
static char _stp_pbuf[NR_CPUS][STP_PRINT_BUF_LEN + 1];
void _stp_print_flush (void)
{
int cpu = smp_processor_id();
char *buf = &_stp_pbuf[cpu][0];
int len = _stp_pbuf_len[cpu];
if (len == 0)
return;
fwrite (buf, len, 1, stdout);
_stp_pbuf_len[cpu] = 0;
}
#define _stp_printf(args...) _stp_sprintf(_stp_stdout,args)
#define _stp_vprintf(fmt,args) _stp_vsprintf(_stp_stdout,fmt,args)
#define _stp_print_cstr(str) _stp_string_cat_cstr(_stp_stdout,str)
#define _stp_print_string(str) _stp_string_cat_string(_stp_stdout,str)
/** Write a String or C string into the print buffer.
* This macro selects the proper function to call.
* @param str A String or C string (char *)
* @sa _stp_print_cstr _stp_print_string
*/
/* Print stuff until a format specification is found. */
/* Return pointer to that. */
static char *next_fmt(char *fmt, int *num)
{
char *f = fmt;
int in_fmt = 0;
dbug ("next_fmt %s\n", fmt);
*num = 0;
while (*f) {
if (in_fmt) {
if (*f == '%') {
_stp_string_cat_char(_stp_stdout,'%');
in_fmt = 0;
} else if (*f > '0' && *f <= '9') {
*num = *f - '0';
f++;
return f;
} else
return f;
} else if (*f == '%')
in_fmt = 1;
else
_stp_string_cat_char(_stp_stdout,*f);
f++;
}
return f;
}
#define _stp_print(str) \
({ \
if (__builtin_types_compatible_p (typeof (str), char[])) { \
char *x = (char *)str; \
_stp_string_cat_cstr(_stp_stdout,x); \
} else { \
String x = (String)str; \
_stp_string_cat_string(_stp_stdout,x); \
} \
})
/** @} */
#endif /* _PRINT_C_ */
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