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Diffstat (limited to 'src/threads/sema.h')
-rw-r--r-- | src/threads/sema.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/threads/sema.h b/src/threads/sema.h new file mode 100644 index 0000000..0cd04a5 --- /dev/null +++ b/src/threads/sema.h @@ -0,0 +1,44 @@ +/* + Copyright (C) 2005-2009 Michel de Boer <michel@twinklephone.com> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#ifndef _H_SEMAPHORE +#define _H_SEMAPHORE + +#include <semaphore.h> + +class t_semaphore { +private: + sem_t sem; + +public: + // Throws a string exception (error message) when failing. + t_semaphore(unsigned int value); + + ~t_semaphore(); + + // Throws a string exception (error message) when failing. + void up(void); + + void down(void); + + // Returns true if downing the semaphore succeeded. + // Returns false if the semaphore was zero already. + bool try_down(void); +}; + +#endif |