90 lines
3.0 KiB
C
90 lines
3.0 KiB
C
/*
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******************************************************************************
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*
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* Copyright (C) 2016 and later: Unicode, Inc. and others.
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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* file name: ucln.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2001July05
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* created by: George Rhoten
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*/
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#ifndef __UCLN_H__
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#define __UCLN_H__
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#include "unicode/utypes.h"
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/** These are the functions used to register a library's memory cleanup
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* functions. Each library should define a single library register function
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* to call this API. In the i18n library, it is ucln_i18n_registerCleanup().
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*
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* None of the cleanup functions should use a mutex to clean up an API's
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* allocated memory because a cleanup function is not meant to be thread safe,
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* and plenty of data cannot be reference counted in order to make sure that
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* no one else needs the allocated data.
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*
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* In order to make a cleanup function get called when u_cleanup is called,
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* You should add your function to the library specific cleanup function.
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* If the cleanup function is not in the common library, the code that
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* allocates the memory should call the library specific cleanup function.
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* For instance, in the i18n library, any memory allocated statically must
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* call ucln_i18n_registerCleanup() from the ucln_in.h header. These library
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* cleanup functions are needed in order to prevent a circular dependency
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* between the common library and any other library.
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*
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* The order of the cleanup is very important. In general, an API that
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* depends on a second API should be cleaned up before the second API.
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* For instance, the default converter in ustring depends upon the converter
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* API. So the default converter should be closed before the converter API
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* has its cache flushed. This will prevent any memory leaks due to
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* reference counting.
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*
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* Please see common/ucln_cmn.{h,c} and i18n/ucln_in.{h,c} for examples.
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*/
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/**
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* Data Type for cleanup function selector. These roughly correspond to libraries.
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*/
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typedef enum ECleanupLibraryType {
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UCLN_START = -1,
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UCLN_UPLUG, /* ICU plugins */
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UCLN_CUSTOM, /* Custom is for anyone else. */
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UCLN_CTESTFW,
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UCLN_TOOLUTIL,
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UCLN_LAYOUTEX,
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UCLN_LAYOUT,
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UCLN_IO,
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UCLN_I18N,
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UCLN_COMMON /* This must be the last one to cleanup. */
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} ECleanupLibraryType;
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/**
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* Data type for cleanup function pointer
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*/
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U_CDECL_BEGIN
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typedef UBool U_CALLCONV cleanupFunc(void);
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typedef void U_CALLCONV initFunc(UErrorCode *);
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U_CDECL_END
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/**
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* Register a cleanup function
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* @param type which library to register for.
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* @param func the function pointer
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*/
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U_CAPI void U_EXPORT2 ucln_registerCleanup(ECleanupLibraryType type,
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cleanupFunc *func);
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/**
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* Request cleanup for one specific library.
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* Not thread safe.
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* @param type which library to cleanup
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*/
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U_CAPI void U_EXPORT2 ucln_cleanupOne(ECleanupLibraryType type);
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#endif
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