dcf::IPCSem Class Reference

#include <ipc_sem.hpp>

Public Member Functions
	IPCSem (bool is_local=true)
virtual	~IPCSem ()
dcf::error_t	create (size_t res_num, int id, const std::string &fname, int mask=0666)
dcf::error_t	create (size_t res_num, key_t key, int mask=0666)
dcf::error_t	operator++ ()
dcf::error_t	operator-- ()
dcf::error_t	allocate (size_t rn=1)
dcf::error_t	release (size_t rn=1)

Protected Attributes
int	m_sid
key_t	m_key
size_t	m_res_num
int	m_mask
bool	m_is_local

Detailed Description

IPC Semaphore

Constructor & Destructor Documentation

dcf::IPCSem::IPCSem

(

bool

is_local = true

)

Default constructor.  Parameter "is_local" defines does 

semaphore live only when object is created or alltime.

virtual dcf::IPCSem::~IPCSem ( )

virtual

Removes semaphore if it is not local.

Member Function Documentation

dcf::error_t dcf::IPCSem::allocate

(

size_t

rn = 1

)

Allocates provided number of resources. Returns ErrSuccess if all correct.

dcf::error_t dcf::IPCSem::create	(	size_t	res_num,
		int	id,
		const std::string &	fname,
		int	mask = 0666
	)

Constructs new semaphore. Access rules mask.

Parameters

res_num	Number of resources to be allocated/deallocated.
id	Uniq semaphore id for key generation.
fname	Exists file name for key generation.

dcf::error_t dcf::IPCSem::create	(	size_t	res_num,
		key_t	key,
		int	mask = 0666
	)

Constructs new semaphore with provided key. Access rules mask.

Parameters

res_num	Number of resources to be allocated/deallocated.
key	Semaphore uniq key

dcf::error_t dcf::IPCSem::operator++ ( )

inline

Allocate one resource.

dcf::error_t dcf::IPCSem::operator-- ( )

inline

Free one resource

dcf::error_t dcf::IPCSem::release

(

size_t

rn = 1

)

Releases provided number of resources. Returns ErrSuccess if all correct.

Member Data Documentation

bool dcf::IPCSem::m_is_local

protected

Does semaphore should be removed after object destruction.

key_t dcf::IPCSem::m_key

protected

Semaphore uniq key.

int dcf::IPCSem::m_mask

protected

Access rules mask.

size_t dcf::IPCSem::m_res_num

protected

Number of resources for allocation.

int dcf::IPCSem::m_sid

protected

Id of semaphore. (>0 if it is created.)

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The documentation for this class was generated from the following file:

• /net/opt/univers/ubp-i-15.3-centos7-x64.urij/include/dcf/ipc_sem.hpp