Leaked source code of windows server 2003
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106 lines
4.2 KiB

// Ruler
// 1 2 3 4 5 6 7 8
//345678901234567890123456789012345678901234567890123456789012345678901234567890
/********************************************************************/
/* */
/* The standard layout. */
/* */
/* The standard layout for 'cpp' files in this code is as */
/* follows: */
/* */
/* 1. Include files. */
/* 2. Constants local to the class. */
/* 3. Data structures local to the class. */
/* 4. Data initializations. */
/* 5. Static functions. */
/* 6. Class functions. */
/* */
/* The constructor is typically the first function, class */
/* member functions appear in alphabetical order with the */
/* destructor appearing at the end of the file. Any section */
/* or function this is not required is simply omitted. */
/* */
/********************************************************************/
#include "LibraryPCH.hpp"
#include "Delay.hpp"
#include "String.hpp"
/********************************************************************/
/* */
/* Static member initialization. */
/* */
/* Static member initialization sets the initial value for all */
/* static members. */
/* */
/********************************************************************/
#pragma init_seg(lib)
#ifdef DISABLE_STRING_LOCKS
UNIQUE<NO_LOCK> *STRING::Unique;
#else
SPINLOCK STRING::Spinlock;
UNIQUE<FULL_LOCK> *STRING::Unique = NULL;
#endif
/********************************************************************/
/* */
/* Create the string table. */
/* */
/* We create the string table on first use. This is tricky as */
/* we may have created multiple threads so we must be careful */
/* to avoid race conditions. We also arrang for the string table */
/* to be deleted at the end of the run unit. */
/* */
/********************************************************************/
VOID STRING::CreateStringTable( VOID )
{
#ifdef DISABLE_STRING_LOCKS
STATIC DELAY<UNIQUE<NO_LOCK>> Delay;
//
// Create the new string table.
//
Unique = new UNIQUE<NO_LOCK>;
//
// Register the string table for deletion at
// at the end of the run unit.
//
Delay.DeferedDelete( Unique );
#else
//
// Claim a lock to avoid race conditions.
//
Spinlock.ClaimLock();
//
// If the string table still does not exist
// then create it.
//
if ( Unique == NULL )
{
STATIC DELAY< UNIQUE<FULL_LOCK> > Delay;
//
// Create the new string table.
//
Unique = new UNIQUE<FULL_LOCK>;
//
// Register the string table for deletion at
// at the end of the run unit.
//
Delay.DeferedDelete( Unique );
}
//
// Release the lock.
//
Spinlock.ReleaseLock();
#endif
}