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/*
******************************************************************************
* *
* Copyright (C) 2009, International Business Machines *
* Corporation and others. All Rights Reserved. *
* *
******************************************************************************
* file name: ucln_imp.h
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* This file contains the platform specific implementation of per-library cleanup.
*
*/
#ifndef __UCLN_IMP_H__
#define __UCLN_IMP_H__
#include "ucln.h"
#include <stdlib.h>
/**
* Auto cleanup of ICU libraries
* There are several methods in per library cleanup of icu libraries:
* 1) Compiler/Platform based cleanup:
* a) Windows MSVC uses DllMain()
* b) GCC uses destructor function attribute
* c) Sun Studio, AIX VA, and HP-UX aCC uses a linker option to set the exit function
* 2) Using atexit()
* 3) Implementing own automatic cleanup functions
*
* For option 1, ensure that UCLN_NO_AUTO_CLEANUP is set to 0 by using --enable-auto-cleanup
* configure option or by setting UCLN_NO_AUTO_CLEANUP to 0 in pwin32.h (For Visual Studio
* solution file builds)
* For option 2, follow option 1 and also define UCLN_AUTO_ATEXIT
* For option 3, follow option 1 and also define UCLN_AUTO_LOCAL (see below for more information)
*/
#if !UCLN_NO_AUTO_CLEANUP
/*
* The following declarations are for when UCLN_AUTO_LOCAL or UCLN_AUTO_ATEXIT
* are defined. They are commented out because they are static and will be defined
* later. The information is still here to provide some guidance for the developer
* who chooses to use UCLN_AUTO_LOCAL.
*/
/**
* Give the library an opportunity to register an automatic cleanup.
* This may be called more than once.
*/
/*static void ucln_registerAutomaticCleanup();*/
/**
* Unregister an automatic cleanup, if possible. Called from cleanup.
*/
/*static void ucln_unRegisterAutomaticCleanup();*/
/* ------------ automatic cleanup: registration. Choose ONE ------- */
#if defined(UCLN_AUTO_LOCAL)
/* To use:
* 1. define UCLN_AUTO_LOCAL,
* 2. create ucln_local_hook.c containing implementations of
* static void ucln_registerAutomaticCleanup()
* static void ucln_unRegisterAutomaticCleanup()
*/
#include "ucln_local_hook.c"
#elif defined(UCLN_AUTO_ATEXIT)
/*
* Use the ANSI C 'atexit' function. Note that this mechanism does not
* guarantee the order of cleanup relative to other users of ICU!
*/
static UBool gAutoCleanRegistered = FALSE;
static void ucln_atexit_handler()
{
ucln_cleanupOne(UCLN_TYPE);
}
static void ucln_registerAutomaticCleanup()
{
if(!gAutoCleanRegistered) {
gAutoCleanRegistered = TRUE;
atexit(&ucln_atexit_handler);
}
}
static void ucln_unRegisterAutomaticCleanup () {
}
/* ------------end of automatic cleanup: registration. ------- */
#elif defined (UCLN_FINI)
/**
* If UCLN_FINI is defined, it is the (versioned, etc) name of a cleanup
* entrypoint. Add a stub to call ucln_cleanupOne
* Used on AIX, Solaris, and HP-UX
*/
U_CAPI void U_EXPORT2 UCLN_FINI (void);
U_CAPI void U_EXPORT2 UCLN_FINI ()
{
/* This function must be defined, if UCLN_FINI is defined, else link error. */
ucln_cleanupOne(UCLN_TYPE);
}
#elif defined(__GNUC__)
/* GCC - use __attribute((destructor)) */
static void ucln_destructor() __attribute__((destructor)) ;
static void ucln_destructor()
{
ucln_cleanupOne(UCLN_TYPE);
}
/* Windows: DllMain */
#elif defined (U_WINDOWS)
/*
* ICU's own DllMain.
*/
/* these are from putil.c */
/* READ READ READ READ! Are you getting compilation errors from windows.h?
Any source file which includes this (ucln_imp.h) header MUST
be defined with language extensions ON. */
# define WIN32_LEAN_AND_MEAN
# define VC_EXTRALEAN
# define NOUSER
# define NOSERVICE
# define NOIME
# define NOMCX
# include <windows.h>
/*
* This is a stub DllMain function with icu specific process handling code.
*/
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
BOOL status = TRUE;
switch(fdwReason) {
case DLL_PROCESS_ATTACH:
/* ICU does not trap process attach, but must pass these through properly. */
/* ICU specific process attach could go here */
break;
case DLL_PROCESS_DETACH:
/* Here is the one we actually care about. */
ucln_cleanupOne(UCLN_TYPE);
break;
case DLL_THREAD_ATTACH:
/* ICU does not trap thread attach, but must pass these through properly. */
/* ICU specific thread attach could go here */
break;
case DLL_THREAD_DETACH:
/* ICU does not trap thread detach, but must pass these through properly. */
/* ICU specific thread detach could go here */
break;
}
return status;
}
#endif
#endif /* UCLN_NO_AUTO_CLEANUP */
#else
#error This file can only be included once.
#endif
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