with shared memory

rktwebview_qt/shm.h

@@ -0,0 +1,60 @@
+#ifndef SHM_H
+#define SHM_H
+
+#include <stdlib.h>
+
+class ShmApi;
+typedef int ShmPlace;
+typedef int ShmSlot;
+
+#define SHM_MAX_SLOTS 100
+#define SHM_NULL      -1
+
+class ShmSem {
+private:
+    void *_sem;
+    char *_name;
+    bool _owner;
+
+public:
+    void post();
+    void wait();
+    bool trywait();
+
+public:
+    ShmSem(const char *n, bool owner);
+    ~ShmSem();
+};
+
+class Shm
+{
+private:
+    ShmApi *_shm_api;
+
+public:
+    ShmPlace alloc(size_t mem);
+    void free(ShmPlace place);
+    void lock();
+    void unlock();
+
+public:
+    ShmPlace slot(ShmSlot s);
+    void setSlot(ShmSlot s, ShmPlace pl);
+
+public:
+    ShmSem *sem(const char *name, bool owner);
+
+public:
+    const char *name();
+
+public:
+    void *ref(int place);
+
+public:
+    Shm(const char *name, size_t bytes, bool owner);
+    ~Shm();
+};
+
+template <class T> void ref(Shm *shm, int place, T **p);
+
+#endif // SHM_H