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# Handle WASI lack of support for <thread> and <atomic>.
#
diff --git a/intl/icu/source/common/putilimp.h b/intl/icu/source/common/putilimp.h
index 5b95a68..7097232 100644
--- a/intl/icu/source/common/putilimp.h
+++ b/intl/icu/source/common/putilimp.h
@@ -103,6 +103,8 @@ typedef size_t uintptr_t;
#endif
#elif U_PLATFORM == U_PF_OS400
/* not defined */
+#elif defined(__wasi__)
+ /* not defined */
#else
# define U_TZSET tzset
#endif
@@ -128,6 +130,8 @@ typedef size_t uintptr_t;
/* not defined */
#elif U_PLATFORM == U_PF_IPHONE
/* not defined */
+#elif defined(__wasi__)
+ /* not defined */
#else
# define U_TIMEZONE timezone
#endif
@@ -141,6 +145,8 @@ typedef size_t uintptr_t;
#endif
#elif U_PLATFORM == U_PF_OS400
/* not defined */
+#elif defined(__wasi__)
+ /* not defined */
#else
# define U_TZNAME tzname
#endif
diff --git a/intl/icu/source/common/umapfile.h b/intl/icu/source/common/umapfile.h
index 92bd567..4ed1112 100644
--- a/intl/icu/source/common/umapfile.h
+++ b/intl/icu/source/common/umapfile.h
@@ -41,6 +41,8 @@ U_CFUNC void uprv_unmapFile(UDataMemory *pData);
#if UCONFIG_NO_FILE_IO
# define MAP_IMPLEMENTATION MAP_NONE
+#elif defined(__wasi__)
+# define MAP_IMPLEMENTATION MAP_STDIO
#elif U_PLATFORM_USES_ONLY_WIN32_API
# define MAP_IMPLEMENTATION MAP_WIN32
#elif U_HAVE_MMAP || U_PLATFORM == U_PF_OS390
diff --git a/intl/icu/source/common/umutex.cpp b/intl/icu/source/common/umutex.cpp
index ccbee99..6c3452c 100644
--- a/intl/icu/source/common/umutex.cpp
+++ b/intl/icu/source/common/umutex.cpp
@@ -43,6 +43,7 @@ U_NAMESPACE_BEGIN
*
*************************************************************************************************/
+#ifndef __wasi__
namespace {
std::mutex *initMutex;
std::condition_variable *initCondition;
@@ -55,9 +56,11 @@ std::once_flag initFlag;
std::once_flag *pInitFlag = &initFlag;
} // Anonymous namespace
+#endif
U_CDECL_BEGIN
static UBool U_CALLCONV umtx_cleanup() {
+#ifndef __wasi__
initMutex->~mutex();
initCondition->~condition_variable();
UMutex::cleanup();
@@ -66,17 +69,21 @@ static UBool U_CALLCONV umtx_cleanup() {
// Do not use this trick anywhere else in ICU; use umtx_initOnce, not std::call_once().
pInitFlag->~once_flag();
pInitFlag = new(&initFlag) std::once_flag();
+#endif
return true;
}
static void U_CALLCONV umtx_init() {
+#ifndef __wasi__
initMutex = STATIC_NEW(std::mutex);
initCondition = STATIC_NEW(std::condition_variable);
ucln_common_registerCleanup(UCLN_COMMON_MUTEX, umtx_cleanup);
+#endif
}
U_CDECL_END
+#ifndef __wasi__
std::mutex *UMutex::getMutex() {
std::mutex *retPtr = fMutex.load(std::memory_order_acquire);
if (retPtr == nullptr) {
@@ -93,14 +100,17 @@ std::mutex *UMutex::getMutex() {
U_ASSERT(retPtr != nullptr);
return retPtr;
}
+#endif
UMutex *UMutex::gListHead = nullptr;
void UMutex::cleanup() {
UMutex *next = nullptr;
for (UMutex *m = gListHead; m != nullptr; m = next) {
+#ifndef __wasi__
(*m->fMutex).~mutex();
m->fMutex = nullptr;
+#endif
next = m->fListLink;
m->fListLink = nullptr;
}
@@ -110,20 +120,24 @@ void UMutex::cleanup() {
U_CAPI void U_EXPORT2
umtx_lock(UMutex *mutex) {
+#ifndef __wasi__
if (mutex == nullptr) {
mutex = &globalMutex;
}
mutex->lock();
+#endif
}
U_CAPI void U_EXPORT2
umtx_unlock(UMutex* mutex)
{
+#ifndef __wasi__
if (mutex == nullptr) {
mutex = &globalMutex;
}
mutex->unlock();
+#endif
}
@@ -143,18 +157,22 @@ umtx_unlock(UMutex* mutex)
//
U_COMMON_API UBool U_EXPORT2
umtx_initImplPreInit(UInitOnce &uio) {
+#ifndef __wasi__
std::call_once(*pInitFlag, umtx_init);
std::unique_lock<std::mutex> lock(*initMutex);
+#endif
if (umtx_loadAcquire(uio.fState) == 0) {
umtx_storeRelease(uio.fState, 1);
return true; // Caller will next call the init function.
} else {
+#ifndef __wasi__
while (umtx_loadAcquire(uio.fState) == 1) {
// Another thread is currently running the initialization.
// Wait until it completes.
initCondition->wait(lock);
}
U_ASSERT(uio.fState == 2);
+#endif
return false;
}
}
@@ -168,11 +186,13 @@ umtx_initImplPreInit(UInitOnce &uio) {
U_COMMON_API void U_EXPORT2
umtx_initImplPostInit(UInitOnce &uio) {
+#ifndef __wasi__
{
std::unique_lock<std::mutex> lock(*initMutex);
umtx_storeRelease(uio.fState, 2);
}
initCondition->notify_all();
+#endif
}
U_NAMESPACE_END
diff --git a/intl/icu/source/common/umutex.h b/intl/icu/source/common/umutex.h
index 8d76b3f..c1a58db 100644
--- a/intl/icu/source/common/umutex.h
+++ b/intl/icu/source/common/umutex.h
@@ -20,9 +20,12 @@
#ifndef UMUTEX_H
#define UMUTEX_H
+#ifndef __wasi__
#include <atomic>
#include <condition_variable>
#include <mutex>
+#endif
+
#include <type_traits>
#include "unicode/utypes.h"
@@ -37,6 +40,8 @@
#error U_USER_ATOMICS and U_USER_MUTEX_H are not supported
#endif
+#ifndef __wasi__
+
// Export an explicit template instantiation of std::atomic<int32_t>.
// When building DLLs for Windows this is required as it is used as a data member of the exported SharedObject class.
// See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.
@@ -61,6 +66,7 @@ template struct std::atomic<std::mutex *>;
#endif
#endif
+#endif
U_NAMESPACE_BEGIN
@@ -70,6 +76,8 @@ U_NAMESPACE_BEGIN
*
****************************************************************************/
+#ifndef __wasi__
+
typedef std::atomic<int32_t> u_atomic_int32_t;
#define ATOMIC_INT32_T_INITIALIZER(val) ATOMIC_VAR_INIT(val)
@@ -89,6 +97,28 @@ inline int32_t umtx_atomic_dec(u_atomic_int32_t *var) {
return var->fetch_sub(1) - 1;
}
+#else
+
+typedef int32_t u_atomic_int32_t;
+#define ATOMIC_INT32_T_INITIALIZER(val) val
+
+inline int32_t umtx_loadAcquire(u_atomic_int32_t &var) {
+ return var;
+}
+
+inline void umtx_storeRelease(u_atomic_int32_t &var, int32_t val) {
+ var = val;
+}
+
+inline int32_t umtx_atomic_inc(u_atomic_int32_t *var) {
+ return ++(*var);
+}
+
+inline int32_t umtx_atomic_dec(u_atomic_int32_t *var) {
+ return --(*var);
+}
+
+#endif
/*************************************************************************************************
*
@@ -231,17 +261,25 @@ class U_COMMON_API UMutex {
// requirements for C++ BasicLockable, allows UMutex to work with std::lock_guard
void lock() {
+#ifndef __wasi__
std::mutex *m = fMutex.load(std::memory_order_acquire);
if (m == nullptr) { m = getMutex(); }
m->lock();
+#endif
+ }
+ void unlock() {
+#ifndef __wasi__
+ fMutex.load(std::memory_order_relaxed)->unlock();
+#endif
}
- void unlock() { fMutex.load(std::memory_order_relaxed)->unlock(); }
static void cleanup();
private:
+#ifndef __wasi__
alignas(std::mutex) char fStorage[sizeof(std::mutex)] {};
std::atomic<std::mutex *> fMutex { nullptr };
+#endif
/** All initialized UMutexes are kept in a linked list, so that they can be found,
* and the underlying std::mutex destructed, by u_cleanup().
@@ -253,7 +291,9 @@ class U_COMMON_API UMutex {
* Initial fast check is inline, in lock(). The returned value may never
* be nullptr.
*/
+#ifndef __wasi__
std::mutex *getMutex();
+#endif
};
diff --git a/intl/icu/source/common/unifiedcache.cpp b/intl/icu/source/common/unifiedcache.cpp
--- a/intl/icu/source/common/unifiedcache.cpp
+++ b/intl/icu/source/common/unifiedcache.cpp
@@ -11,19 +11,23 @@
*/
#include "unifiedcache.h"
#include <algorithm> // For std::max()
-#include <mutex>
+#ifndef __wasi__
+ #include <mutex>
+#endif
#include "uassert.h"
#include "uhash.h"
#include "ucln_cmn.h"
static icu::UnifiedCache *gCache = nullptr;
+#ifndef __wasi__
static std::mutex *gCacheMutex = nullptr;
static std::condition_variable *gInProgressValueAddedCond;
+#endif
static icu::UInitOnce gCacheInitOnce {};
static const int32_t MAX_EVICT_ITERATIONS = 10;
static const int32_t DEFAULT_MAX_UNUSED = 1000;
static const int32_t DEFAULT_PERCENTAGE_OF_IN_USE = 100;
@@ -32,14 +36,16 @@ static const int32_t DEFAULT_PERCENTAGE_OF_IN_USE = 100;
U_CDECL_BEGIN
static UBool U_CALLCONV unifiedcache_cleanup() {
gCacheInitOnce.reset();
delete gCache;
gCache = nullptr;
+#ifndef __wasi__
gCacheMutex->~mutex();
gCacheMutex = nullptr;
gInProgressValueAddedCond->~condition_variable();
gInProgressValueAddedCond = nullptr;
+#endif
return true;
}
U_CDECL_END
@@ -70,12 +76,14 @@ CacheKeyBase::~CacheKeyBase() {
static void U_CALLCONV cacheInit(UErrorCode &status) {
U_ASSERT(gCache == nullptr);
ucln_common_registerCleanup(
UCLN_COMMON_UNIFIED_CACHE, unifiedcache_cleanup);
+#ifndef __wasi__
gCacheMutex = STATIC_NEW(std::mutex);
gInProgressValueAddedCond = STATIC_NEW(std::condition_variable);
+#endif
gCache = new UnifiedCache(status);
if (gCache == nullptr) {
status = U_MEMORY_ALLOCATION_ERROR;
}
if (U_FAILURE(status)) {
@@ -133,41 +141,53 @@ void UnifiedCache::setEvictionPolicy(
}
if (count < 0 || percentageOfInUseItems < 0) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
fMaxUnused = count;
fMaxPercentageOfInUse = percentageOfInUseItems;
}
int32_t UnifiedCache::unusedCount() const {
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
return uhash_count(fHashtable) - fNumValuesInUse;
}
int64_t UnifiedCache::autoEvictedCount() const {
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
return fAutoEvictedCount;
}
int32_t UnifiedCache::keyCount() const {
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
return uhash_count(fHashtable);
}
void UnifiedCache::flush() const {
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
// Use a loop in case cache items that are flushed held hard references to
// other cache items making those additional cache items eligible for
// flushing.
while (_flush(false));
}
void UnifiedCache::handleUnreferencedObject() const {
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
--fNumValuesInUse;
_runEvictionSlice();
}
#ifdef UNIFIED_CACHE_DEBUG
@@ -182,11 +202,13 @@ void UnifiedCache::dump() {
}
cache->dumpContents();
}
void UnifiedCache::dumpContents() const {
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
_dumpContents();
}
// Dumps content of cache.
// On entry, gCacheMutex must be held.
@@ -222,11 +244,13 @@ UnifiedCache::~UnifiedCache() {
flush();
{
// Now all that should be left in the cache are entries that refer to
// each other and entries with hard references from outside the cache.
// Nothing we can do about these so proceed to wipe out the cache.
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
_flush(true);
}
uhash_close(fHashtable);
fHashtable = nullptr;
delete fNoValue;
@@ -323,11 +347,13 @@ void UnifiedCache::_putNew(
void UnifiedCache::_putIfAbsentAndGet(
const CacheKeyBase &key,
const SharedObject *&value,
UErrorCode &status) const {
+#ifndef __wasi__
std::lock_guard<std::mutex> lock(*gCacheMutex);
+#endif
const UHashElement *element = uhash_find(fHashtable, &key);
if (element != nullptr && !_inProgress(element)) {
_fetch(element, value, status);
return;
}
@@ -348,18 +374,22 @@ UBool UnifiedCache::_poll(
const CacheKeyBase &key,
const SharedObject *&value,
UErrorCode &status) const {
U_ASSERT(value == nullptr);
U_ASSERT(status == U_ZERO_ERROR);
+#ifndef __wasi__
std::unique_lock<std::mutex> lock(*gCacheMutex);
+#endif
const UHashElement *element = uhash_find(fHashtable, &key);
// If the hash table contains an inProgress placeholder entry for this key,
// this means that another thread is currently constructing the value object.
// Loop, waiting for that construction to complete.
while (element != nullptr && _inProgress(element)) {
+#ifndef __wasi__
gInProgressValueAddedCond->wait(lock);
+#endif
element = uhash_find(fHashtable, &key);
}
// If the hash table contains an entry for the key,
// fetch out the contents and return them.
@@ -426,13 +456,15 @@ void UnifiedCache::_put(
UHashElement *ptr = const_cast<UHashElement *>(element);
ptr->value.pointer = (void *) value;
U_ASSERT(oldValue == fNoValue);
removeSoftRef(oldValue);
+#ifndef __wasi__
// Tell waiting threads that we replace in-progress status with
// an error.
gInProgressValueAddedCond->notify_all();
+#endif
}
void UnifiedCache::_fetch(
const UHashElement *element,
const SharedObject *&value,
diff --git a/intl/icu/source/i18n/decContext.h b/intl/icu/source/i18n/decContext.h
index 59ab65e..20f3526 100644
--- a/intl/icu/source/i18n/decContext.h
+++ b/intl/icu/source/i18n/decContext.h
@@ -61,7 +61,9 @@
/* #include <stdint.h> */ /* C99 standard integers */
#endif
#include <stdio.h> /* for printf, etc. */
+#ifndef __wasi__
#include <signal.h> /* for traps */
+#endif
/* Extended flags setting -- set this to 0 to use only IEEE flags */
#if !defined(DECEXTFLAG)
diff --git a/intl/icu/source/i18n/decimfmt.cpp b/intl/icu/source/i18n/decimfmt.cpp
index daa1129..c8f1eda 100644
--- a/intl/icu/source/i18n/decimfmt.cpp
+++ b/intl/icu/source/i18n/decimfmt.cpp
@@ -480,8 +480,13 @@ DecimalFormat& DecimalFormat::operator=(const DecimalFormat& rhs) {
DecimalFormat::~DecimalFormat() {
if (fields == nullptr) { return; }
+#ifndef __wasi__
delete fields->atomicParser.exchange(nullptr);
delete fields->atomicCurrencyParser.exchange(nullptr);
+#else
+ delete fields->atomicParser;
+ delete fields->atomicCurrencyParser;
+#endif
delete fields;
}
@@ -1626,8 +1631,13 @@ void DecimalFormat::touch(UErrorCode& status) {
setupFastFormat();
// Delete the parsers if they were made previously
+#ifndef __wasi__
delete fields->atomicParser.exchange(nullptr);
delete fields->atomicCurrencyParser.exchange(nullptr);
+#else
+ delete fields->atomicParser;
+ delete fields->atomicCurrencyParser;
+#endif
// In order for the getters to work, we need to populate some fields in NumberFormat.
NumberFormat::setCurrency(fields->exportedProperties.currency.get(status).getISOCurrency(), status);
@@ -1662,7 +1672,11 @@ const numparse::impl::NumberParserImpl* DecimalFormat::getParser(UErrorCode& sta
}
// First try to get the pre-computed parser
+#ifndef __wasi__
auto* ptr = fields->atomicParser.load();
+#else
+ auto* ptr = fields->atomicParser;
+#endif
if (ptr != nullptr) {
return ptr;
}
@@ -1681,6 +1695,7 @@ const numparse::impl::NumberParserImpl* DecimalFormat::getParser(UErrorCode& sta
// it is set to what is actually stored in the atomic
// if another thread beat us to computing the parser object.
auto* nonConstThis = const_cast<DecimalFormat*>(this);
+#ifndef __wasi__
if (!nonConstThis->fields->atomicParser.compare_exchange_strong(ptr, temp)) {
// Another thread beat us to computing the parser
delete temp;
@@ -1689,13 +1704,21 @@ const numparse::impl::NumberParserImpl* DecimalFormat::getParser(UErrorCode& sta
// Our copy of the parser got stored in the atomic
return temp;
}
+#else
+ nonConstThis->fields->atomicParser = temp;
+ return temp;
+#endif
}
const numparse::impl::NumberParserImpl* DecimalFormat::getCurrencyParser(UErrorCode& status) const {
if (U_FAILURE(status)) { return nullptr; }
// First try to get the pre-computed parser
+#ifndef __wasi__
auto* ptr = fields->atomicCurrencyParser.load();
+#else
+ auto* ptr = fields->atomicCurrencyParser;
+#endif
if (ptr != nullptr) {
return ptr;
}
@@ -1710,6 +1733,7 @@ const numparse::impl::NumberParserImpl* DecimalFormat::getCurrencyParser(UErrorC
// Note: ptr starts as nullptr; during compare_exchange, it is set to what is actually stored in the
// atomic if another thread beat us to computing the parser object.
auto* nonConstThis = const_cast<DecimalFormat*>(this);
+#ifndef __wasi__
if (!nonConstThis->fields->atomicCurrencyParser.compare_exchange_strong(ptr, temp)) {
// Another thread beat us to computing the parser
delete temp;
@@ -1718,6 +1742,10 @@ const numparse::impl::NumberParserImpl* DecimalFormat::getCurrencyParser(UErrorC
// Our copy of the parser got stored in the atomic
return temp;
}
+#else
+ nonConstThis->fields->atomicCurrencyParser = temp;
+ return temp;
+#endif
}
void
diff --git a/intl/icu/source/i18n/number_mapper.h b/intl/icu/source/i18n/number_mapper.h
index 9ecd776..d094289 100644
--- a/intl/icu/source/i18n/number_mapper.h
+++ b/intl/icu/source/i18n/number_mapper.h
@@ -7,7 +7,6 @@
#ifndef __NUMBER_MAPPER_H__
#define __NUMBER_MAPPER_H__
-#include <atomic>
#include "number_types.h"
#include "unicode/currpinf.h"
#include "standardplural.h"
@@ -15,6 +14,10 @@
#include "number_currencysymbols.h"
#include "numparse_impl.h"
+#ifndef __wasi__
+#include <atomic>
+#endif
+
U_NAMESPACE_BEGIN
namespace number {
namespace impl {
@@ -193,10 +196,18 @@ struct DecimalFormatFields : public UMemory {
LocalizedNumberFormatter formatter;
/** The lazy-computed parser for .parse() */
+#ifndef __wasi__
std::atomic<::icu::numparse::impl::NumberParserImpl*> atomicParser = {};
+#else
+ ::icu::numparse::impl::NumberParserImpl* atomicParser = nullptr;
+#endif
/** The lazy-computed parser for .parseCurrency() */
+#ifndef __wasi__
std::atomic<::icu::numparse::impl::NumberParserImpl*> atomicCurrencyParser = {};
+#else
+ ::icu::numparse::impl::NumberParserImpl* atomicCurrencyParser = {};
+#endif
/** Small object ownership warehouse for the formatter and parser */
DecimalFormatWarehouse warehouse;
diff --git a/intl/icu/source/i18n/numrange_fluent.cpp b/intl/icu/source/i18n/numrange_fluent.cpp
--- a/intl/icu/source/i18n/numrange_fluent.cpp
+++ b/intl/icu/source/i18n/numrange_fluent.cpp
@@ -238,33 +238,53 @@ LocalizedNumberRangeFormatter::LocalizedNumberRangeFormatter(LocalizedNumberRang
LocalizedNumberRangeFormatter::LocalizedNumberRangeFormatter(NFS<LNF>&& src) noexcept
: NFS<LNF>(std::move(src)) {
// Steal the compiled formatter
LNF&& _src = static_cast<LNF&&>(src);
+#ifndef __wasi__
auto* stolen = _src.fAtomicFormatter.exchange(nullptr);
delete fAtomicFormatter.exchange(stolen);
+#else
+ delete fAtomicFormatter;
+ fAtomicFormatter = _src.fAtomicFormatter;
+ _src.fAtomicFormatter = nullptr;
+#endif
}
LocalizedNumberRangeFormatter& LocalizedNumberRangeFormatter::operator=(const LNF& other) {
if (this == &other) { return *this; } // self-assignment: no-op
NFS<LNF>::operator=(static_cast<const NFS<LNF>&>(other));
// Do not steal; just clear
+#ifndef __wasi__
delete fAtomicFormatter.exchange(nullptr);
+#else
+ delete fAtomicFormatter;
+#endif
return *this;
}
LocalizedNumberRangeFormatter& LocalizedNumberRangeFormatter::operator=(LNF&& src) noexcept {
NFS<LNF>::operator=(static_cast<NFS<LNF>&&>(src));
// Steal the compiled formatter
+#ifndef __wasi__
auto* stolen = src.fAtomicFormatter.exchange(nullptr);
delete fAtomicFormatter.exchange(stolen);
+#else
+ delete fAtomicFormatter;
+ fAtomicFormatter = src.fAtomicFormatter;
+ src.fAtomicFormatter = nullptr;
+#endif
return *this;
}
LocalizedNumberRangeFormatter::~LocalizedNumberRangeFormatter() {
+#ifndef __wasi__
delete fAtomicFormatter.exchange(nullptr);
+#else
+ delete fAtomicFormatter;
+#endif
}
LocalizedNumberRangeFormatter::LocalizedNumberRangeFormatter(const RangeMacroProps& macros, const Locale& locale) {
fMacros = macros;
fMacros.locale = locale;
@@ -344,11 +364,15 @@ LocalizedNumberRangeFormatter::getFormatter(UErrorCode& status) const {
if (U_FAILURE(status)) {
return nullptr;
}
// First try to get the pre-computed formatter
+#ifndef __wasi__
auto* ptr = fAtomicFormatter.load();
+#else
+ auto* ptr = fAtomicFormatter;
+#endif
if (ptr != nullptr) {
return ptr;
}
// Try computing the formatter on our own
@@ -364,18 +388,23 @@ LocalizedNumberRangeFormatter::getFormatter(UErrorCode& status) const {
// Note: ptr starts as nullptr; during compare_exchange,
// it is set to what is actually stored in the atomic
// if another thread beat us to computing the formatter object.
auto* nonConstThis = const_cast<LocalizedNumberRangeFormatter*>(this);
+#ifndef __wasi__
if (!nonConstThis->fAtomicFormatter.compare_exchange_strong(ptr, temp)) {
// Another thread beat us to computing the formatter
delete temp;
return ptr;
} else {
// Our copy of the formatter got stored in the atomic
return temp;
}
+#else
+ nonConstThis->fAtomicFormatter = temp;
+ return temp;
+#endif
}
#endif /* #if !UCONFIG_NO_FORMATTING */
diff --git a/intl/icu/source/i18n/unicode/numberrangeformatter.h b/intl/icu/source/i18n/unicode/numberrangeformatter.h
index b9a4600..0ba2fa0 100644
--- a/intl/icu/source/i18n/unicode/numberrangeformatter.h
+++ b/intl/icu/source/i18n/unicode/numberrangeformatter.h
@@ -10,7 +10,6 @@
#if !UCONFIG_NO_FORMATTING
-#include <atomic>
#include "unicode/appendable.h"
#include "unicode/fieldpos.h"
#include "unicode/formattedvalue.h"
@@ -18,6 +17,10 @@
#include "unicode/numberformatter.h"
#include "unicode/unumberrangeformatter.h"
+#ifndef __wasi__
+#include <atomic>
+#endif
+
/**
* \file
* \brief C++ API: Library for localized formatting of number, currency, and unit ranges.
@@ -77,7 +80,9 @@ struct UFormattedNumberRangeImpl;
} // namespace icu::number
U_NAMESPACE_END
+#ifndef __wasi__
template struct U_I18N_API std::atomic< U_NAMESPACE_QUALIFIER number::impl::NumberRangeFormatterImpl*>;
+#endif
U_NAMESPACE_BEGIN
namespace number { // icu::number
@@ -546,7 +551,11 @@ class U_I18N_API LocalizedNumberRangeFormatter
~LocalizedNumberRangeFormatter();
private:
+#ifndef __wasi__
std::atomic<impl::NumberRangeFormatterImpl*> fAtomicFormatter = {};
+#else
+ impl::NumberRangeFormatterImpl* fAtomicFormatter = nullptr;
+#endif
const impl::NumberRangeFormatterImpl* getFormatter(UErrorCode& stauts) const;