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author | Kevin Tang <zhikait@codeaurora.org> | 2015-06-16 09:57:42 -0700 |
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committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2015-08-04 14:29:48 -0700 |
commit | bb5d2d4bfb12df717f35f3d2365ce0263d319fe7 (patch) | |
tree | 11bd1981dc486d76656bdd7632f5df2526f4fec0 /utils/LocThread.h | |
parent | d0faf18e26bdc4bfc38c164b3f3060843e443ba5 (diff) | |
download | gps-bb5d2d4bfb12df717f35f3d2365ce0263d319fe7.tar.gz |
Adding a number of utilities
LocHeap, LocThread, LocTimer, and moved MsgTask to
utils. Also added are LocRankable and LocRunnable
abstract classes.
Change-Id: I76975455d24f2c84a95dcc1b04f79fea562ea5ba
CRs-Fixed: 855222
Diffstat (limited to 'utils/LocThread.h')
-rw-r--r-- | utils/LocThread.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/utils/LocThread.h b/utils/LocThread.h new file mode 100644 index 0000000..490d309 --- /dev/null +++ b/utils/LocThread.h @@ -0,0 +1,87 @@ +/* Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * * Neither the name of The Linux Foundation, nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#ifndef __LOC_THREAD__ +#define __LOC_THREAD__ + +#include <stddef.h> + +// abstract class to be implemented by client to provide a runnable class +// which gets scheduled by LocThread +class LocRunnable { +public: + inline LocRunnable() {} + inline virtual ~LocRunnable() {} + + // The method to be implemented by thread clients + // and be scheduled by LocThread + // This method will be repeated called until it returns false; or + // until thread is stopped. + virtual bool run() = 0; + + // The method to be run before thread loop (conditionally repeatedly) + // calls run() + inline virtual void prerun() {} + + // The method to be run after thread loop (conditionally repeatedly) + // calls run() + inline virtual void postrun() {} +}; + +// opaque class to provide service implementation. +class LocThreadDelegate; + +// A utility class to create a thread and run LocRunnable +// caller passes in. +class LocThread { + LocThreadDelegate* mThread; +public: + inline LocThread() : mThread(NULL) {} + virtual ~LocThread(); + + // client starts thread with a runnable, which implements + // the logics to fun in the created thread context. + // The thread could be either joinable or detached. + // runnable is an obj managed by client. Client creates and + // frees it (but must be after stop() is called, or + // this LocThread obj is deleted). + // The obj will be deleted by LocThread if start() + // returns true. Else it is client's responsibility + // to delete the object + // Returns 0 if success; false if failure. + bool start(const char* threadName, LocRunnable* runnable, bool joinable = true); + + // NOTE: if this is a joinable thread, this stop may block + // for a while until the thread is joined. + void stop(); + + // thread status check + inline bool isRunning() { return NULL != mThread; } +}; + +#endif //__LOC_THREAD__ |