d13e68c206
pipacketextractor Header mode now more flexible fix splitTime mode more refactoring add virtual override to functions remove piforeach replace 0 to nullptr iterate over pimap via iterators replace CONNECTU to CONNECT# with compile time check
114 lines
5.0 KiB
C++
114 lines
5.0 KiB
C++
/*! \file pisharedmemory.h
|
||
* \ingroup IO
|
||
* \~\brief
|
||
* \~english Shared memory
|
||
* \~russian Разделяемая память
|
||
*/
|
||
/*
|
||
PIP - Platform Independent Primitives
|
||
Shared Memory
|
||
Ivan Pelipenko peri4ko@yandex.ru
|
||
|
||
This program is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU Lesser General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU Lesser General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Lesser General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
#ifndef PISHAREDMEMORY_H
|
||
#define PISHAREDMEMORY_H
|
||
|
||
#include "piiodevice.h"
|
||
|
||
|
||
//! \ingroup IO
|
||
//! \~\brief
|
||
//! \~english Shared memory.
|
||
//! \~russian Разделяемая память.
|
||
class PIP_EXPORT PISharedMemory: public PIIODevice
|
||
{
|
||
PIIODEVICE(PISharedMemory, "shm");
|
||
public:
|
||
|
||
//! \~english Constructs empty %PISharedMemory
|
||
//! \~russian Создает пустой %PISharedMemory
|
||
explicit PISharedMemory();
|
||
|
||
//! \~english Constructs a shared memory object with name "shm_name", size "size" and open mode "mode"
|
||
//! \~russian Создает объект разделяемой памяти с именем "shm_name", размером "size" и режимом открытия "mode"
|
||
explicit PISharedMemory(const PIString & shm_name, int size, DeviceMode mode = ReadWrite);
|
||
|
||
virtual ~PISharedMemory();
|
||
|
||
|
||
//! \~english Read all shared memory content and return it as byte array
|
||
//! \~russian Читает всю разделяемую память и возвращает её как байтовый массив
|
||
PIByteArray readAll();
|
||
|
||
//! \~english Returns shared memory size
|
||
//! \~russian Возвращает размер разделяемой памяти
|
||
llong size() const;
|
||
|
||
//! \~english Set shared memory size
|
||
//! \~russian Устанавливает размер разделяемой памяти
|
||
void setSize(llong s);
|
||
|
||
//! \~english Returns if shared memory object is empty (by size)
|
||
//! \~russian Возвращает пустой ли объект разделяемой памяти (по размеру)
|
||
bool isEmpty() const {return (size() <= 0);}
|
||
|
||
//! \~english Read from shared memory to "read_to" no more than "max_size" and return readed bytes count
|
||
//! \~russian Читает из разделяемой памяти в "read_to" не более "max_size" и возвращает количество прочитанных байт
|
||
int read(void * read_to, int max_size);
|
||
|
||
//! \~english Read from shared memory started from "offset" to "read_to" no more than "max_size" and return readed bytes count
|
||
//! \~russian Читает из разделяемой памяти с начала "offset" в "read_to" не более "max_size" и возвращает количество прочитанных байт
|
||
int read(void * read_to, int max_size, int offset);
|
||
|
||
//! \~english Write to shared memory "data" with size "max_size" and return written bytes count
|
||
//! \~russian Пишет в разделяемую память "data" размером "max_size" и возвращает количество записанных байт
|
||
int write(const void * data, int max_size);
|
||
|
||
//! \~english Write to shared memory started from "offset" "data" with size "max_size" and return written bytes count
|
||
//! \~russian Пишет в разделяемую память с начала "offset" "data" размером "max_size" и возвращает количество записанных
|
||
int write(const void * data, int max_size, int offset);
|
||
|
||
//! \~english Write "data" to shared memory
|
||
//! \~russian Пишет в разделяемую память "data"
|
||
int write(const PIByteArray & data) {return write(data.data(), data.size_s());}
|
||
|
||
//! \~english Write "data" to shared memory
|
||
//! \~russian Пишет в разделяемую память "data"
|
||
int write(const PIByteArray & data, int offset) {return write(data.data(), data.size_s(), offset);}
|
||
|
||
|
||
protected:
|
||
virtual bool openDevice() override;
|
||
virtual bool closeDevice() override;
|
||
virtual PIString constructFullPathDevice() const override;
|
||
virtual void configureFromFullPathDevice(const PIString & full_path) override;
|
||
virtual PIPropertyStorage constructVariantDevice() const override;
|
||
virtual void configureFromVariantDevice(const PIPropertyStorage & d) override;
|
||
virtual int readDevice(void * read_to, int max_size) override {return read(read_to, max_size, 0);}
|
||
virtual int writeDevice(const void * data, int max_size) override {return write(data, max_size, 0);}
|
||
virtual DeviceInfoFlags deviceInfoFlags() const override {return PIIODevice::Reliable;}
|
||
|
||
private:
|
||
void initPrivate();
|
||
|
||
int dsize;
|
||
PRIVATE_DECLARATION(PIP_EXPORT)
|
||
|
||
};
|
||
|
||
|
||
#endif // PISHAREDMEMORY_H
|