ddda212faa
Discovered that we had a few libc hotspots. Adjust code to generally reduce or nullify the number of calls to malloc, free, strlen, strcmp, strncmp, memcmp & strncasecmp. Total gain looks to be about 3% of logd's processing time. malloc still contributes to 3%, but all others are now total 0.5%. Bug: 23685592 Change-Id: Ife721121667969260cdb8b055524ae90f5911278
62 lines
2 KiB
C++
62 lines
2 KiB
C++
/*
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* Copyright (C) 2012-2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LOGD_LOG_UTILS_H__
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#define _LOGD_LOG_UTILS_H__
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#include <sys/types.h>
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#include <log/log.h>
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// Hijack this header as a common include file used by most all sources
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// to report some utilities defined here and there.
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namespace android {
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// Furnished in main.cpp. Caller must own and free returned value
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char *uidToName(uid_t uid);
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// Furnished in LogStatistics.cpp. Caller must own and free returned value
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char *pidToName(pid_t pid);
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char *tidToName(pid_t tid);
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// Furnished in main.cpp. Thread safe.
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const char *tagToName(uint32_t tag);
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}
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static inline bool worstUidEnabledForLogid(log_id_t id) {
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return (id != LOG_ID_CRASH) && (id != LOG_ID_KERNEL) && (id != LOG_ID_EVENTS);
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}
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template <int (*cmp)(const char *l, const char *r, const size_t s)>
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static inline int fast(const char *l, const char *r, const size_t s) {
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return (*l != *r) || cmp(l + 1, r + 1, s - 1);
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}
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template <int (*cmp)(const void *l, const void *r, const size_t s)>
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static inline int fast(const void *lv, const void *rv, const size_t s) {
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const char *l = static_cast<const char *>(lv);
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const char *r = static_cast<const char *>(rv);
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return (*l != *r) || cmp(l + 1, r + 1, s - 1);
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}
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template <int (*cmp)(const char *l, const char *r)>
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static inline int fast(const char *l, const char *r) {
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return (*l != *r) || cmp(l + 1, r + 1);
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}
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#endif // _LOGD_LOG_UTILS_H__
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