124 lines
2.2 KiB
C
124 lines
2.2 KiB
C
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#pragma once
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// Objects for Inter-Process-Communication
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//
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// created on 2022-03-01
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//
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#ifdef WIN32
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#include <Windows.h>
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#define sem_t HANDLE
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#define USB_TIMEOUT_INFINITE -1
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#else
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#include <semaphore.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#define USB_TIMEOUT_INFINITE 0
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#endif
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#include <string>
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#include <mutex>
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class platform_event
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{
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sem_t sem_;
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volatile bool waiting_;
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std::string dbg_info_;
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public:
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platform_event();
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~platform_event();
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public:
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bool try_wait(void);
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bool wait(unsigned timeout = USB_TIMEOUT_INFINITE/*ms*/); // USB_TIMEOUT_INFINITE is waiting unfinite, true when watied and false for wait timeout
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void notify(void);
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bool is_waiting(void);
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void set_debug_info(const char* info);
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};
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class refer
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{
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volatile int ref_;
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std::mutex mutex_;
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protected:
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refer() : ref_(1)
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{}
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virtual ~refer()
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{}
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public:
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int add_ref(void)
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{
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std::lock_guard<std::mutex> lock(mutex_);
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return ++ref_;
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}
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int release(void)
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{
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int ref = 0;
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{
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std::lock_guard<std::mutex> lock(mutex_);
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ref = --ref_;
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}
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if (ref == 0)
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delete this;
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return ref;
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}
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};
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template<class T>
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class do_when_born_and_dead : public refer
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{
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T* obj_;
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void(T::* dead_)(void*);
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void* param_;
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public:
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do_when_born_and_dead(T* obj, void(T::* born)(void*), void(T::* dead)(void*), void* param)
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: obj_(obj), dead_(dead), param_(param)
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{
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if(born)
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(obj_->*born)(param_);
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}
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protected:
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~do_when_born_and_dead()
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{
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(obj_->*dead_)(param_);
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}
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};
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// mutex object
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class shared_memory : public refer
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{
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unsigned long long key_;
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void* obj_;
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bool first_;
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size_t bytes_;
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size_t len_;
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void init(void);
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void clear(void);
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char* get_buf(void);
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void release_buf(void* buf);
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public:
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shared_memory(unsigned long long key, size_t size = 1024);
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protected:
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~shared_memory();
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public:
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bool is_ok(void);
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bool is_first(void);
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std::string read(void);
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int write(const char* data, size_t len);
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};
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