| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ****************************************************************************** |
| * Copyright (C) 2001-2014, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ****************************************************************************** |
| * file name: ucln_cmn.cpp |
| * encoding: UTF-8 |
| * tab size: 8 (not used) |
| * indentation:4 |
| * |
| * created on: 2001July05 |
| * created by: George Rhoten |
| */ |
| |
| #include "unicode/utypes.h" |
| #include "unicode/uclean.h" |
| #include "cmemory.h" |
| #include "mutex.h" |
| #include "uassert.h" |
| #include "ucln.h" |
| #include "ucln_cmn.h" |
| #include "utracimp.h" |
| #include "umutex.h" |
| |
| /** Auto-client for UCLN_COMMON **/ |
| #define UCLN_TYPE_IS_COMMON |
| #include "ucln_imp.h" |
| |
| static cleanupFunc *gCommonCleanupFunctions[UCLN_COMMON_COUNT]; |
| static cleanupFunc *gLibCleanupFunctions[UCLN_COMMON]; |
| |
| |
| /************************************************ |
| The cleanup order is important in this function. |
| Please be sure that you have read ucln.h |
| ************************************************/ |
| U_CAPI void U_EXPORT2 |
| u_cleanup(void) |
| { |
| UTRACE_ENTRY_OC(UTRACE_U_CLEANUP); |
| icu::umtx_lock(NULL); /* Force a memory barrier, so that we are sure to see */ |
| icu::umtx_unlock(NULL); /* all state left around by any other threads. */ |
| |
| ucln_lib_cleanup(); |
| |
| cmemory_cleanup(); /* undo any heap functions set by u_setMemoryFunctions(). */ |
| UTRACE_EXIT(); /* Must be before utrace_cleanup(), which turns off tracing. */ |
| /*#if U_ENABLE_TRACING*/ |
| utrace_cleanup(); |
| /*#endif*/ |
| } |
| |
| U_CAPI void U_EXPORT2 ucln_cleanupOne(ECleanupLibraryType libType) |
| { |
| if (gLibCleanupFunctions[libType]) |
| { |
| gLibCleanupFunctions[libType](); |
| gLibCleanupFunctions[libType] = NULL; |
| } |
| } |
| |
| U_CFUNC void |
| ucln_common_registerCleanup(ECleanupCommonType type, |
| cleanupFunc *func) |
| { |
| // Thread safety messiness: From ticket 10295, calls to registerCleanup() may occur |
| // concurrently. Although such cases should be storing the same value, they raise errors |
| // from the thread sanity checker. Doing the store within a mutex avoids those. |
| // BUT that can trigger a recursive entry into std::call_once() in umutex.cpp when this code, |
| // running from the call_once function, tries to grab the ICU global mutex, which |
| // re-enters the mutex init path. So, work-around by special casing UCLN_COMMON_MUTEX, not |
| // using the ICU global mutex for it. |
| // |
| // No other point in ICU uses std::call_once(). |
| |
| U_ASSERT(UCLN_COMMON_START < type && type < UCLN_COMMON_COUNT); |
| if (type == UCLN_COMMON_MUTEX) { |
| gCommonCleanupFunctions[type] = func; |
| } else if (UCLN_COMMON_START < type && type < UCLN_COMMON_COUNT) { |
| icu::Mutex m; // See ticket 10295 for discussion. |
| gCommonCleanupFunctions[type] = func; |
| } |
| #if !UCLN_NO_AUTO_CLEANUP && (defined(UCLN_AUTO_ATEXIT) || defined(UCLN_AUTO_LOCAL)) |
| ucln_registerAutomaticCleanup(); |
| #endif |
| } |
| |
| // Note: ucln_registerCleanup() is called with the ICU global mutex locked. |
| // Be aware if adding anything to the function. |
| // See ticket 10295 for discussion. |
| |
| U_CAPI void U_EXPORT2 |
| ucln_registerCleanup(ECleanupLibraryType type, |
| cleanupFunc *func) |
| { |
| U_ASSERT(UCLN_START < type && type < UCLN_COMMON); |
| if (UCLN_START < type && type < UCLN_COMMON) |
| { |
| gLibCleanupFunctions[type] = func; |
| } |
| } |
| |
| U_CFUNC UBool ucln_lib_cleanup(void) { |
| int32_t libType = UCLN_START; |
| int32_t commonFunc = UCLN_COMMON_START; |
| |
| for (libType++; libType<UCLN_COMMON; libType++) { |
| ucln_cleanupOne(static_cast<ECleanupLibraryType>(libType)); |
| } |
| |
| for (commonFunc++; commonFunc<UCLN_COMMON_COUNT; commonFunc++) { |
| if (gCommonCleanupFunctions[commonFunc]) |
| { |
| gCommonCleanupFunctions[commonFunc](); |
| gCommonCleanupFunctions[commonFunc] = NULL; |
| } |
| } |
| #if !UCLN_NO_AUTO_CLEANUP && (defined(UCLN_AUTO_ATEXIT) || defined(UCLN_AUTO_LOCAL)) |
| ucln_unRegisterAutomaticCleanup(); |
| #endif |
| return TRUE; |
| } |