Reader Writer Problem

System2/RW_problem/tprintf.c

@@ -0,0 +1,48 @@
+/* 	Utilitaire printf estampille : a reutiliser ... 
+	print et fprintf prefixes par "seconds:microsecondes:pid: "  ou "seconds:microsecondes:pid:tid: "
+*/
+
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <stdarg.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "tprintf.h"
+
+
+
+/* printf estampille : a reutiliser ... */
+
+int tprintf(const char * message, ... ) {
+	va_list liste;
+	char chaine [1000];
+	struct timeval t;
+	int pid = getpid();
+	int tid = (int) syscall(SYS_gettid);
+	va_start(liste, message);
+	gettimeofday( &t, NULL);
+	vsprintf(chaine, message, liste);
+	if ( pid == tid ) 
+		return printf("%ld:%ld:%i: %s", t.tv_sec, t.tv_usec, pid, chaine );
+	else
+		return printf("%ld:%ld:%i:%i %s", t.tv_sec, t.tv_usec, pid, tid, chaine );
+}
+
+int tfprintf(FILE * stream, const char * message, ... ) {
+	va_list liste;
+	char chaine [1000];
+	struct timeval t;
+	int pid = getpid();
+	int tid = (int) syscall(SYS_gettid);
+	va_start(liste, message);
+	gettimeofday( &t, NULL);
+	vsprintf(chaine, message, liste);
+	if ( pid == tid ) 
+		return fprintf(stream, "%ld:%ld:%i: %s", t.tv_sec, t.tv_usec, pid, chaine );
+	else
+		return fprintf(stream, "%ld:%ld:%i:%i %s", t.tv_sec, t.tv_usec, pid, tid, chaine );
+}
+