cplusxtors.cpp

来自「vxworks源码源码解读是学习vxworks的最佳途径」· C++ 代码 · 共 89 行

/* cplusXtors.cpp - run time support for static ctors and dtors */

/* Copyright 1993 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01c,03jun93,srh  doc cleanup
01b,23apr93,srh  implemented new force-link/initialization scheme
01a,31jan93,srh  written.
*/

/*
DESCRIPTION
This module contains core run time support for static constructors and
destructors. It contains no user-callable routines.

NOMANUAL
*/

/* Includes */

#include "vxWorks.h"
#include "cplusLib.h"

/* Defines */

/* Typedefs */

/* Globals */

char __cplusXtors_o;

/* Locals */

/* Forward declarations */

/******************************************************************************
*
* cplusCallCtors - call static constructors
*
* This routine takes a <ctors> array, as generated by the munch utility,
* and calls the function which is pointed to by each entry. Each function
* in the <ctors> array calls the static constructors for one compilation
* unit. The functions are called in the first-to-last order.
*
* NOMANUAL
*/
void cplusCallCtors
    (
    VOIDFUNCPTR *ctors		// array of pointers to ctor-calling functions
    )
    {
    // call ctors in order
    for (VOIDFUNCPTR *pVFP = ctors; *pVFP != 0; pVFP++)
	{
	(**pVFP)();
	}
    }
/******************************************************************************
*
* cplusCallDtors - call static destructors
*
* This routine takes a <dtors> array, as generated by the munch utility,
* and calls the function which is pointed to by each entry. Each function
* in the <dtors> array calls the static destructors for one compilation
* unit. The functions are called in the last-to-first order, reversing
* the order in which the static constructors were originally called.
*
* NOMANUAL
*/
void cplusCallDtors 
    (
    VOIDFUNCPTR *dtors		// array of pointers to dtor-calling functions
    )
    {
    // advance pVFP to end of dtors list
    for (VOIDFUNCPTR *pVFP = dtors; *pVFP != 0; pVFP++)
	{
	}
    
    // call dtors in reverse order of ctors
    while (pVFP > dtors)
	{
	(**--pVFP)();
	}
    }