Notifier.h

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00001 /*
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00038 
00039 #ifndef _OASYS_NOTIFIER_H_
00040 #define _OASYS_NOTIFIER_H_
00041 
00042 #include "../debug/Log.h"
00043 
00044 namespace oasys {
00045 
00046 class SpinLock;
00047 
00061 class Notifier : public Logger {
00062 public:
00067     Notifier(const char* logpath, bool keep_quiet = false);
00068 
00072     ~Notifier();
00073 
00083     bool wait(SpinLock* lock = NULL, int timeout = -1);
00084 
00093     void notify(SpinLock* lock = NULL);
00094 
00101     void drain_pipe(size_t bytes);
00102 
00107     int read_fd() { return pipe_[0]; }
00108 
00112     int write_fd() { return pipe_[1]; }
00113     
00114 protected:
00115     bool waiter_; // for debugging only
00116     int  count_;  // for debugging as well
00117     int  pipe_[2];
00118     bool quiet_;  // no logging
00119 };
00120 
00121 } // namespace oasys
00122 
00123 #endif /* _OASYS_NOTIFIER_H_ */

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