69 lines
1.0 KiB
C++
69 lines
1.0 KiB
C++
#ifndef SHM_H
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#define SHM_H
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#include <stdlib.h>
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class ShmApi;
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class ShmSemApi;
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typedef int ShmPlace;
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typedef int ShmSlot;
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#define SHM_MAX_SLOTS 100
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#define SHM_NULL -1
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class ShmSem {
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private:
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ShmSemApi *_api;
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public:
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void post();
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void wait();
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bool trywait();
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public:
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ShmSem(const char *n, bool owner);
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~ShmSem();
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};
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class Shm
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{
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private:
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ShmApi *_shm_api;
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public:
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ShmPlace alloc(size_t mem);
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void free(ShmPlace place);
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void lock();
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void unlock();
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public:
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ShmPlace slot(ShmSlot s);
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void setSlot(ShmSlot s, ShmPlace pl);
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public:
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ShmSem *sem(const char *name, bool owner);
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public:
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bool isValid();
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public:
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const char *name();
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public:
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void *ref(int place);
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public:
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void info(int &usage, int &free_depth, int &free_size, int &item_depth, int &item_size, double &usage_factor);
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public:
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Shm(const char *name, size_t bytes, bool owner);
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~Shm();
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};
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template <class T> inline void ref(Shm *shm, int place, T **p)
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{
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*p = reinterpret_cast<T *>(shm->ref(place));
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}
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#endif // SHM_H
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