add vcglib

vcglib/wrap/system/multithreading/semaphore.h

@@ -0,0 +1,96 @@
+#ifndef MT_SEMAPHORE_H
+#define MT_SEMAPHORE_H
+
+#include "base.h"
+
+#include <iostream>
+#include <semaphore.h>
+
+namespace mt
+{
+
+class semaphore
+{
+  MT_PREVENT_COPY(semaphore)
+
+  public:
+
+  typedef semaphore this_type;
+  typedef void      base_type;
+
+  semaphore(void)
+  {
+    sem_init(&(this->s), 0, 0);
+  }
+
+  semaphore(int value)
+  {
+    sem_init(&(this->s), 0, value);
+  }
+
+  ~semaphore(void)
+  {
+    sem_destroy(&(this->s));
+  }
+
+  void post(void)
+  {
+    sem_post(&(this->s));
+  }
+
+  /*
+  void post(int n)
+  {
+    sem_post_multiple(&(this->s), n);
+  }
+  */
+
+  void wait(void)
+  {
+    sem_wait(&(this->s));
+  }
+
+  bool trywait(void)
+  {
+    return (sem_trywait(&(this->s)) == 0);
+  }
+
+  //methods added for conforming to the QT implementation
+  //jnoguera 14-12-2011
+
+  void release(int n=1)
+  {
+    if(n != 1)
+      std::cout << "Error, mt::semaphore.release() not supported\n";
+    sem_post(&(this->s));
+  }
+
+  void acquire(int n=1)
+  {
+    if(n != 1)
+      std::cout << "Error, mt::semaphore.tryAcquire() not supported\n";
+    sem_wait(&(this->s));
+  }
+
+  bool tryAcquire(int n=1)
+  {
+  if(n != 1)
+    std::cout << "Error, mt::semaphore.tryAcquire() not supported\n";
+  return (sem_trywait(&(this->s)) == 0);
+  }
+
+  int available()
+  {
+    int value;
+    sem_getvalue( &(this->s), &value );
+    return value;
+  }
+
+private:
+
+sem_t s;
+};
+
+}
+
+#endif // MT_SEMAPHORE_H