basic/log: expose log_dispatch

This is useful when we want to avoid printf formatting on the message.
It's nicer than using log_struct with "%s" as the format, because printf
is slow and with a large message (like from a backtrace) this would require
extra unnecessary memory.

I'm not exposing all the fields in the wrapper: only level and errno.
Those are the most likely to be useful.

diff --git a/src/basic/log.c b/src/basic/log.c
index 36efc9a..0d0ced0 100644 (file)
--- a/src/basic/log.c
+++ b/src/basic/log.c
@@ -553,7 +553,7 @@ static int write_to_journal(
         return 1;
 }
 
-static int log_dispatch(
+int log_dispatch_internal(
                 int level,
                 int error,
                 const char *file,
@@ -653,7 +653,7 @@ int log_dump_internal(
         if (_likely_(LOG_PRI(level) > log_max_level))
                 return -error;
 
-        return log_dispatch(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
+        return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
 }
 
 int log_internalv(
@@ -680,7 +680,7 @@ int log_internalv(
 
         vsnprintf(buffer, sizeof(buffer), format, ap);
 
-        return log_dispatch(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
+        return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
 }
 
 int log_internal(
@@ -744,7 +744,8 @@ int log_object_internalv(
 
         vsnprintf(b, l, format, ap);
 
-        return log_dispatch(level, error, file, line, func, object_field, object, extra_field, extra, buffer);
+        return log_dispatch_internal(level, error, file, line, func,
+                                     object_field, object, extra_field, extra, buffer);
 }
 
 int log_object_internal(
@@ -788,7 +789,7 @@ static void log_assert(
 
         log_abort_msg = buffer;
 
-        log_dispatch(level, 0, file, line, func, NULL, NULL, NULL, NULL, buffer);
+        log_dispatch_internal(level, 0, file, line, func, NULL, NULL, NULL, NULL, buffer);
 }
 
 noreturn void log_assert_failed(const char *text, const char *file, int line, const char *func) {
@@ -943,7 +944,7 @@ int log_struct_internal(
         if (!found)
                 return -error;
 
-        return log_dispatch(level, error, file, line, func, NULL, NULL, NULL, NULL, buf + 8);
+        return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buf + 8);
 }
 
 int log_set_target_from_string(const char *e) {

diff --git a/src/basic/log.h b/src/basic/log.h
index cdb6600..b3e4060 100644 (file)
--- a/src/basic/log.h
+++ b/src/basic/log.h
@@ -75,6 +75,18 @@ void log_close_console(void);
 
 void log_parse_environment(void);
 
+int log_dispatch_internal(
+                int level,
+                int error,
+                const char *file,
+                int line,
+                const char *func,
+                const char *object_field,
+                const char *object,
+                const char *extra,
+                const char *extra_field,
+                char *buffer);
+
 int log_internal(
                 int level,
                 int error,
@@ -167,6 +179,9 @@ void log_assert_failed_return(
                 int line,
                 const char *func);
 
+#define log_dispatch(level, error, buffer)                              \
+        log_dispatch_internal(level, error, __FILE__, __LINE__, __func__, NULL, NULL, NULL, NULL, buffer)
+
 /* Logging with level */
 #define log_full_errno(level, error, ...)                               \
         ({                                                              \