From b252c6af5f14e743789530509ef651cebd6cf6c3 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Wed, 4 Jun 2008 19:23:42 +0200
Subject: [PATCH] Cleaned up interface of the logger.

Also uninlined log_switch_{en,dis}able().
---
 lib/lib.h      | 15 ++++++++-------
 lib/log-file.c | 15 ++++++++++++++-
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/lib/lib.h b/lib/lib.h
index 1bd0b354..e93bdf6a 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -90,11 +90,10 @@
 #define L_ERROR_R	'e'
 #define L_FATAL		'!'		/* die() */
 
-#define L_SIGHANDLER	0x10000		/* Avoid things which are unsafe in signal handlers */
+#define L_SIGHANDLER	0x10000		/* Avoid operations that are unsafe in signal handlers */
 
-extern char *log_title;			/* NULL - print no title, default is log_progname */
+extern char *log_title;			/* NULL - print no title, default is program name given to log_init() */
 extern char *log_filename;		/* Expanded name of the current log file */
-extern volatile int log_switch_nest;	/* log_switch() nesting counter, increment to disable automatic switches */
 extern int log_pid;			/* 0 if shouldn't be logged */
 extern int log_precise_timings;		/* Include microsecond timestamps in log messages */
 extern void (*log_die_hook)(void);
@@ -106,8 +105,13 @@ void vmsg(uns cat, const char *fmt, va_list args);
 void die(const char *, ...) NONRET FORMAT_CHECK(printf,1,2);
 void log_init(const char *argv0);
 void log_file(const char *name);
-void log_fork(void);
+void log_fork(void);			/* Call after fork() to update log_pid */
+
+/* If the log name contains metacharacters for date and time, we switch the logs
+ * automatically whenever the name changes. You can disable it and switch explicitly. */
 int log_switch(void);
+void log_switch_disable(void);
+void log_switch_enable(void);
 
 void assert_failed(const char *assertion, const char *file, int line) NONRET;
 void assert_failed_noinfo(void) NONRET;
@@ -126,9 +130,6 @@ void assert_failed_noinfo(void) NONRET;
 #define DBG(x,y...) do { } while(0)
 #endif
 
-static inline void log_switch_disable(void) { log_switch_nest++; }
-static inline void log_switch_enable(void) { ASSERT(log_switch_nest); log_switch_nest--; }
-
 /* Memory allocation */
 
 #define xmalloc sh_xmalloc
diff --git a/lib/log-file.c b/lib/log-file.c
index 401e797c..0b22ff24 100644
--- a/lib/log-file.c
+++ b/lib/log-file.c
@@ -20,7 +20,7 @@
 static char *log_name_patt;
 static int log_params;
 static int log_filename_size;
-volatile int log_switch_nest;
+static int log_switch_nest;
 
 static int
 do_log_switch(struct tm *tm)
@@ -94,6 +94,19 @@ log_fork(void)
   log_pid = getpid();
 }
 
+void
+log_switch_disable(void)
+{
+  log_switch_nest++;
+}
+
+void
+log_switch_enable(void)
+{
+  ASSERT(log_switch_nest);
+  log_switch_nest--;
+}
+
 #ifdef TEST
 
 int main(int argc, char **argv)
-- 
2.39.2