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Showing content from http://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/doxyhtml/interprocess__lock_8cpp_source.html below:

NCBI C++ ToolKit: src/corelib/interprocess_lock.cpp Source File

);

(exception&) {}

( lockf(fd, F_TLOCK, 0) < 0) {

flock lockparam;

lockparam.l_type = F_WRLCK;

lockparam.l_start = 0;

(fcntl(fd, F_SETLK, &lockparam) < 0) {

(x_errno != EINTR) {

\

);

fd = open(

.c_str(), O_CREAT | O_RDWR, perm);

ms_gran;

ms_gran =

(

/5, (

)500);

(x_errno != EACCES &&

x_errno != EAGAIN ) {

ms_sleep = ms_gran;

(ms_sleep >

) {

\

);

errno_t errcode = ::GetLastError();

ERROR_ACCESS_DENIED:

);

ERROR_INVALID_HANDLE:

\

);

);

(errcode == ERROR_ALREADY_EXISTS) {

res = WaitForSingleObject(handle, INFINITE);

::CloseHandle(handle);

\

::CloseHandle(handle);

);

);

( it->second > 1 ) {

res = lockf(

, F_ULOCK, 0);

flock lockparam;

lockparam.l_type = F_UNLCK;

lockparam.l_start = 0;

res = fcntl(

, F_SETLK, &lockparam);

);

( !::ReleaseMutex(

) ) {

);

CInterProcessLockException –.

CTimeout – Timeout interval.

container_type::iterator iterator

#define NCBI_THROW(exception_class, err_code, message)

Generic macro to throw an exception, given the exception class, error code and message string.

TErrCode GetErrCode(void) const

virtual const char * GetErrCodeString(void) const

Get error code interpreted as text.

static bool IsAbsolutePath(const string &path)

Check if a "path" is absolute for the current OS.

static mode_t MakeModeT(TMode user_mode, TMode group_mode, TMode other_mode, TSpecialModeBits special)

Construct mode_t value from permission modes.

@ fWrite

Write permission.

string m_SystemName

Adjusted name of the lock.

bool TryLock(void)

Try to acquire the lock.

void Unlock(void)

Release the lock.

~CInterProcessLock(void)

Call Unlock()

void Lock(const CTimeout &timeout=CTimeout(CTimeout::eInfinite), const CTimeout &granularity=CTimeout(CTimeout::eInfinite))

CInterProcessLock(const string &name)

void Remove(void)

Call Unlock() and removes lock object from the system.

string m_Name

Original name of the lock.

virtual const char * GetErrCodeString(void) const override

Translate from an error code value to its string representation.

@ eUnlockError

Cannot release the lock.

@ eLockError

Cannot acquire a lock (not eLockTimeout, eCreateError)

@ eLockTimeout

The lock could not be acquired in the time allotted.

@ eNotLocked

Attempt to unlock a not-yet-acquired lock.

@ eMultipleLocks

Attempt to lock already locked object in the same process.

@ eCreateError

Cannot create the lock object in the OS.

#define END_NCBI_SCOPE

End previously defined NCBI scope.

#define BEGIN_NCBI_SCOPE

Define ncbi namespace.

static string & Replace(const string &src, const string &search, const string &replace, string &dst, SIZE_TYPE start_pos=0, SIZE_TYPE max_replace=0, SIZE_TYPE *num_replace=0)

Replace occurrences of a substring within a string.

unsigned long GetAsMilliSeconds(void) const

Get as number of milliseconds.

#define HANDLE

An abstraction for a file handle.

static CSafeStatic< TLocks > s_Locks

DEFINE_STATIC_FAST_MUTEX(s_ProcessLock)

static int s_UnixLock(int fd)

Try to acquire a lock for specified file descriptor.

const int kInvalidLockHandle

System specific invalid lock handle.

map< string, int > TLocks

Simple inter-process lock.

#define TRUE

bool replacment for C indicating true.

void SleepMilliSec(unsigned long ml_sec, EInterruptOnSignal onsignal=eRestartOnSignal)

Defines classes: CDirEntry, CFile, CDir, CSymLink, CMemoryFile, CFileUtil, CFileLock,...

static SLJIT_INLINE sljit_ins ms(sljit_gpr r, sljit_s32 d, sljit_gpr x, sljit_gpr b)

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