1 /* 2 ****************************************************************************** 3 * 4 * Copyright (C) 2001-2013, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ****************************************************************************** 8 * file name: ucln.h 9 * encoding: US-ASCII 10 * tab size: 8 (not used) 11 * indentation:4 12 * 13 * created on: 2001July05 14 * created by: George Rhoten 15 */ 16 17 #ifndef __UCLN_H__ 18 #define __UCLN_H__ 19 20 #include "unicode/utypes.h" 21 22 /** These are the functions used to register a library's memory cleanup 23 * functions. Each library should define a single library register function 24 * to call this API. In the i18n library, it is ucln_i18n_registerCleanup(). 25 * 26 * None of the cleanup functions should use a mutex to clean up an API's 27 * allocated memory because a cleanup function is not meant to be thread safe, 28 * and plenty of data cannot be reference counted in order to make sure that 29 * no one else needs the allocated data. 30 * 31 * In order to make a cleanup function get called when u_cleanup is called, 32 * You should add your function to the library specific cleanup function. 33 * If the cleanup function is not in the common library, the code that 34 * allocates the memory should call the library specific cleanup function. 35 * For instance, in the i18n library, any memory allocated statically must 36 * call ucln_i18n_registerCleanup() from the ucln_in.h header. These library 37 * cleanup functions are needed in order to prevent a circular dependency 38 * between the common library and any other library. 39 * 40 * The order of the cleanup is very important. In general, an API that 41 * depends on a second API should be cleaned up before the second API. 42 * For instance, the default converter in ustring depends upon the converter 43 * API. So the default converter should be closed before the converter API 44 * has its cache flushed. This will prevent any memory leaks due to 45 * reference counting. 46 * 47 * Please see common/ucln_cmn.{h,c} and i18n/ucln_in.{h,c} for examples. 48 */ 49 50 /** 51 * Data Type for cleanup function selector. These roughly correspond to libraries. 52 */ 53 typedef enum ECleanupLibraryType { 54 UCLN_START = -1, 55 UCLN_UPLUG, /* ICU plugins */ 56 UCLN_CUSTOM, /* Custom is for anyone else. */ 57 UCLN_CTESTFW, 58 UCLN_TOOLUTIL, 59 UCLN_LAYOUTEX, 60 UCLN_LAYOUT, 61 UCLN_IO, 62 UCLN_I18N, 63 UCLN_COMMON /* This must be the last one to cleanup. */ 64 } ECleanupLibraryType; 65 66 /** 67 * Data type for cleanup function pointer 68 */ 69 U_CDECL_BEGIN 70 typedef UBool U_CALLCONV cleanupFunc(void); 71 typedef void U_CALLCONV initFunc(UErrorCode *); 72 U_CDECL_END 73 74 /** 75 * Register a cleanup function 76 * @param type which library to register for. 77 * @param func the function pointer 78 */ 79 U_CAPI void U_EXPORT2 ucln_registerCleanup(ECleanupLibraryType type, 80 cleanupFunc *func); 81 82 /** 83 * Request cleanup for one specific library. 84 * Not thread safe. 85 * @param type which library to cleanup 86 */ 87 U_CAPI void U_EXPORT2 ucln_cleanupOne(ECleanupLibraryType type); 88 89 #endif 90