11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_UTILITIES_SEMAPHORE_HPP
  26 #define SHARE_VM_UTILITIES_SEMAPHORE_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 
  31 #define IMPLEMENTS_SEMAPHORE_CLASS 1
  32 
  33 #if defined(TARGET_OS_FAMILY_bsd)
  34 # include "semaphore_bsd.hpp"
  35 #elif defined(TARGET_OS_FAMILY_linux)
  36 # include "semaphore_linux.hpp"
  37 #elif defined(TARGET_OS_FAMILY_solaris)
  38 # include "semaphore_solaris.hpp"
  39 #elif defined(TARGET_OS_FAMILY_windows)
  40 # include "semaphore_windows.hpp"
  41 #else
  42   // Redefine for platforms that don't implement the Semaphore class.
  43 # undef  IMPLEMENTS_SEMAPHORE_CLASS
  44 # define IMPLEMENTS_SEMAPHORE_CLASS 0
  45 #endif
  46 
  47 #if IMPLEMENTS_SEMAPHORE_CLASS
  48 
  49 class Semaphore : public CHeapObj<mtInternal> {








  50  public:
  51   static const uint NoMaxCount = (uint)-1;
  52 
  53   Semaphore(uint value = 0, uint max = NoMaxCount);
  54   ~Semaphore();

  55   void signal();
  56   void signal(uint count);

  57   void wait();
  58   bool trywait();
  59   bool timedwait(unsigned int sec, int nsec);
  60  private:
  61   os_semaphore_t _semaphore;
  62 };
  63 
  64 #endif
  65 
  66 #endif // SHARE_VM_UTILITIES_SEMAPHORE_HPP

  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_UTILITIES_SEMAPHORE_HPP
  26 #define SHARE_VM_UTILITIES_SEMAPHORE_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 
  31 #if defined(TARGET_OS_FAMILY_linux) || defined(TARGET_OS_FAMILY_solaris) || defined(TARGET_OS_FAMILY_aix)
  32 # include "semaphore_posix.hpp"
  33 #elif defined(TARGET_OS_FAMILY_bsd)
  34 # include "semaphore_bsd.hpp"




  35 #elif defined(TARGET_OS_FAMILY_windows)
  36 # include "semaphore_windows.hpp"
  37 #else
  38 # error "No semaphore implementation provided for this OS"


  39 #endif
  40 


  41 class Semaphore : public CHeapObj<mtInternal> {
  42  private:
  43   // Prevent copying and assignment of Semaphore instances.
  44   Semaphore(const Semaphore &);
  45   Semaphore& operator=(const Semaphore&);
  46 
  47  protected:
  48   os_semaphore_t _semaphore;
  49 
  50  public:
  51   static const uint NoMaxCount = (uint)-1;
  52 
  53   Semaphore(uint value = 0, uint max = NoMaxCount);
  54   virtual ~Semaphore();
  55 
  56   void signal();
  57   void signal(uint count);
  58 
  59   void wait();




  60 };


  61 
  62 #endif // SHARE_VM_UTILITIES_SEMAPHORE_HPP