diff --git a/include/fast_io_core_impl/freestanding/algorithm.h b/include/fast_io_core_impl/freestanding/algorithm.h
index 98dcd4642..560a3c60c 100644
--- a/include/fast_io_core_impl/freestanding/algorithm.h
+++ b/include/fast_io_core_impl/freestanding/algorithm.h
@@ -768,10 +768,10 @@ inline constexpr ForwardIt uninitialized_fill(ForwardIt first, ForwardIt last, T
 }
 
 template <::std::input_iterator ForwardIt, typename T>
-inline constexpr void uninitialized_fill_n(ForwardIt first, ::std::size_t n, T const &x) noexcept(
+inline constexpr ForwardIt uninitialized_fill_n(ForwardIt first, ::std::size_t n, T const &x) noexcept(
 	::std::is_nothrow_copy_constructible_v<typename ::std::iterator_traits<ForwardIt>::value_type>)
 {
-	::fast_io::freestanding::uninitialized_fill(first, ::std::next(first, n), x);
+	return ::fast_io::freestanding::uninitialized_fill(first, ::std::next(first, n), x);
 }
 
 template <::std::forward_iterator ForwardIt>
diff --git a/include/fast_io_hosted/file_loaders/posix_file_loader.h b/include/fast_io_hosted/file_loaders/posix_file_loader.h
index 1527ef409..fc8834e76 100644
--- a/include/fast_io_hosted/file_loaders/posix_file_loader.h
+++ b/include/fast_io_hosted/file_loaders/posix_file_loader.h
@@ -34,7 +34,7 @@ inline void posix_unload_address(void *address, [[maybe_unused]] ::std::size_t f
 {
 	if (address != (void *)-1) [[likely]]
 	{
-		sys_munmap(address, file_size);
+		sys_munmap_nothrow(address, file_size);
 	}
 }
 
diff --git a/include/fast_io_hosted/platforms/posix_mapping.h b/include/fast_io_hosted/platforms/posix_mapping.h
index b2a6eb375..97f005ee3 100644
--- a/include/fast_io_hosted/platforms/posix_mapping.h
+++ b/include/fast_io_hosted/platforms/posix_mapping.h
@@ -69,7 +69,7 @@ inline int sys_mprotect(void *start, ::std::size_t len, int prot)
 	return result;
 }
 
-inline int sys_munmap(void *addr, ::std::size_t len)
+inline int sys_munmap_nothrow(void *addr, ::std::size_t len)
 {
 	return
 #if defined(__linux__) && defined(__NR_munmap)
@@ -79,9 +79,9 @@ inline int sys_munmap(void *addr, ::std::size_t len)
 #endif
 }
 
-inline void sys_munmap_throw_error(void *addr, ::std::size_t len)
+inline void sys_munmap(void *addr, ::std::size_t len)
 {
-	system_call_throw_error(sys_munmap(addr, len));
+	system_call_throw_error(sys_munmap_nothrow(addr, len));
 }
 } // namespace details
 
@@ -195,7 +195,7 @@ class posix_memory_map_file
 		}
 		if (this->address_begin != reinterpret_cast<::std::byte *>(MAP_FAILED)) [[likely]]
 		{
-			details::sys_munmap(this->address_begin, static_cast<::std::size_t>(address_end - address_begin));
+			details::sys_munmap_nothrow(this->address_begin, static_cast<::std::size_t>(address_end - address_begin));
 		}
 		this->address_begin = other.address_begin;
 		this->address_end = other.address_end;
@@ -291,20 +291,20 @@ class posix_memory_map_file
 	{
 		return address_begin[pos];
 	}
-	inline void close()
+	inline constexpr void close()
 	{
 		if (this->address_begin != MAP_FAILED) [[likely]]
 		{
-			auto ret{details::sys_munmap(this->address_begin, static_cast<::std::size_t>(address_end - address_begin))};
+			auto ret{details::sys_munmap_nothrow(this->address_begin, static_cast<::std::size_t>(address_end - address_begin))};
 			this->address_end = this->address_begin = reinterpret_cast<::std::byte *>(MAP_FAILED);
 			system_call_throw_error(ret);
 		}
 	}
-	inline ~posix_memory_map_file()
+	inline constexpr ~posix_memory_map_file()
 	{
 		if (this->address_begin != MAP_FAILED) [[likely]]
 		{
-			details::sys_munmap(this->address_begin, static_cast<::std::size_t>(address_end - address_begin));
+			details::sys_munmap_nothrow(this->address_begin, static_cast<::std::size_t>(address_end - address_begin));
 		}
 	}
 };
diff --git a/include/fast_io_hosted/platforms/win32/apis.h b/include/fast_io_hosted/platforms/win32/apis.h
index 9dbb96d44..b72785e27 100644
--- a/include/fast_io_hosted/platforms/win32/apis.h
+++ b/include/fast_io_hosted/platforms/win32/apis.h
@@ -170,5 +170,8 @@ FAST_IO_DLLIMPORT int FAST_IO_WINSTDCALL PrefetchVirtualMemory(void *, ::std::si
 FAST_IO_DLLIMPORT int FAST_IO_WINSTDCALL SetConsoleTextAttribute(void *, ::std::int_least32_t) noexcept FAST_IO_WINSTDCALL_RENAME(SetConsoleTextAttribute, 8);
 FAST_IO_DLLIMPORT ::std::uint_least32_t FAST_IO_WINSTDCALL GetCurrentThreadId() noexcept FAST_IO_WINSTDCALL_RENAME(GetCurrentThreadId, 0);
 FAST_IO_DLLIMPORT void FAST_IO_WINSTDCALL Sleep(::std::uint_least32_t) noexcept FAST_IO_WINSTDCALL_RENAME(Sleep, 4);
-
+FAST_IO_DLLIMPORT char16_t *FAST_IO_WINSTDCALL GetEnvironmentStringsW() noexcept FAST_IO_WINSTDCALL_RENAME(GetEnvironmentStringsW, 0);
+FAST_IO_DLLIMPORT char *FAST_IO_WINSTDCALL GetEnvironmentStringsA() noexcept FAST_IO_WINSTDCALL_RENAME(GetEnvironmentStringsA, 0);
+FAST_IO_DLLIMPORT int FAST_IO_WINSTDCALL FreeEnvironmentStringsW(char16_t*) noexcept FAST_IO_WINSTDCALL_RENAME(FreeEnvironmentStringsW, 4);
+FAST_IO_DLLIMPORT int FAST_IO_WINSTDCALL FreeEnvironmentStringsA(char*) noexcept FAST_IO_WINSTDCALL_RENAME(FreeEnvironmentStringsA, 4);
 } // namespace fast_io::win32
diff --git a/include/fast_io_hosted/threads/thread/c_malloc_guard.h b/include/fast_io_hosted/threads/thread/c_malloc_guard.h
index f86f53a64..bd17f6466 100644
--- a/include/fast_io_hosted/threads/thread/c_malloc_guard.h
+++ b/include/fast_io_hosted/threads/thread/c_malloc_guard.h
@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 namespace fast_io::details
 {
diff --git a/include/fast_io_hosted/threads/thread/impl.h b/include/fast_io_hosted/threads/thread/impl.h
index 61944f32d..b7d97f585 100644
--- a/include/fast_io_hosted/threads/thread/impl.h
+++ b/include/fast_io_hosted/threads/thread/impl.h
@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 #if (defined(_WIN32) && !defined(__WINE__)) && !defined(__CYGWIN__)
 #ifdef _WIN32_WINDOWS
diff --git a/include/fast_io_hosted/threads/thread/nt.h b/include/fast_io_hosted/threads/thread/nt.h
index 42892bfcd..923b21f79 100644
--- a/include/fast_io_hosted/threads/thread/nt.h
+++ b/include/fast_io_hosted/threads/thread/nt.h
@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 #include <chrono>
 #include <ranges>
diff --git a/include/fast_io_hosted/threads/thread/posix.h b/include/fast_io_hosted/threads/thread/posix.h
index 6f70f09be..73b4b8665 100644
--- a/include/fast_io_hosted/threads/thread/posix.h
+++ b/include/fast_io_hosted/threads/thread/posix.h
@@ -1 +1 @@
-#pragma once
+#pragma once
diff --git a/include/fast_io_hosted/threads/thread/win32.h b/include/fast_io_hosted/threads/thread/win32.h
index ee3ce2830..17bf17f70 100644
--- a/include/fast_io_hosted/threads/thread/win32.h
+++ b/include/fast_io_hosted/threads/thread/win32.h
@@ -1,4 +1,4 @@
-#pragma once
+#pragma once
 
 #include <chrono>
 #include <ranges>