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Code Issues Releases Wiki Activity

330. [func] New function isc_log_wouldlog().

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This commit is contained in:
Andreas Gustafsson
2000-07-13 00:19:02 +00:00
parent ecb2897c71
commit 30576c592b
3 changed files with 40 additions and 20 deletions
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2
CHANGES
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@@ -1,3 +1,5 @@
330. [func] New function isc_log_wouldlog().
329. [func] omapi_auth_register() now takes a size_t argument for
the length of a key's secret data. Previously
OMAPI only stored secrets up to the first NUL byte.

13
lib/isc/include/isc/log.h
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@@ -15,7 +15,7 @@
* SOFTWARE.
*/
/* $Id: log.h,v 1.25 2000/06/19 21:45:03 explorer Exp $ */
/* $Id: log.h,v 1.26 2000/07/13 00:18:53 gson Exp $ */
#ifndef ISC_LOG_H
#define ISC_LOG_H 1
@@ -627,6 +627,17 @@ isc_log_getdebuglevel(isc_log_t *lctx);
* The current logging debugging level is returned.
*/
isc_boolean_t
isc_log_wouldlog(isc_log_t *lctx, int level);
/*
* Determine whether logging something to 'lctx' at 'level' would
* actually cause something to be logged somewhere.
*
* If ISC_FALSE is returned, it is guaranteed that nothing would
* be logged, allowing the caller to omit unnecessary
* isc_log_write() calls and possible message preformatting.
*/
void
isc_log_setduplicateinterval(isc_logconfig_t *lcfg, unsigned int interval);
/*

45
lib/isc/log.c
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@@ -15,7 +15,7 @@
* SOFTWARE.
*/
/* $Id: log.c,v 1.38 2000/06/23 17:52:20 tale Exp $ */
/* $Id: log.c,v 1.39 2000/07/13 00:18:51 gson Exp $ */
/* Principal Authors: DCL */
@@ -1197,6 +1197,30 @@ isc_log_open(isc_logchannel_t *channel) {
return (ISC_R_SUCCESS);
}
isc_boolean_t
isc_log_wouldlog(isc_log_t *lctx, int level) {
/*
* Try to avoid locking the mutex for messages which can't
* possibly be logged to any channels -- primarily debugging
* messages that the debug level is not high enough to print.
*
* If the level is (mathematically) less than or equal to the
* highest_level, or if there is a dynamic channel and the level is
* less than or equal to the debug level, the main loop must be
* entered to see if the message should really be output.
*
* NOTE: this is UNLOCKED access to the logconfig. However,
* the worst thing that can happen is that a bad decision is made
* about returning without logging, and that's not a big concern,
* because that's a risk anyway if the logconfig is being
* dynamically changed.
*/
return (ISC_TF(level <= lctx->logconfig->highest_level ||
(lctx->logconfig->dynamic &&
level <= lctx->debug_level)));
}
static void
isc_log_doit(isc_log_t *lctx, isc_logcategory_t *category,
isc_logmodule_t *module, int level, isc_boolean_t write_once,
@@ -1232,24 +1256,7 @@ isc_log_doit(isc_log_t *lctx, isc_logcategory_t *category,
REQUIRE(category->id < lctx->category_count);
REQUIRE(module->id < lctx->module_count);
/*
* Try to avoid locking the mutex for messages which can't
* possibly be logged to any channels -- primarily debugging
* messages that the debug level is not high enough to print.
*
* If the level is (mathematically) less than or equal to the
* highest_level, or if there is a dynamic channel and the level is
* less than or equal to the debug level, the main loop must be
* entered to see if the message should really be output.
*
* NOTE: this is UNLOCKED access to the logconfig. However,
* the worst thing that can happen is that a bad decision is made
* about returning without logging, and that's not a big concern,
* because that's a risk anyway if the logconfig is being
* dynamically changed.
*/
if (! (level <= lctx->logconfig->highest_level ||
(lctx->logconfig->dynamic && level <= lctx->debug_level)))
if (! isc_log_wouldlog(lctx, level))
return;
time_string[0] = '\0';