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68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_I18N_ICU_UTIL_H_
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#define BASE_I18N_ICU_UTIL_H_
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#include <stdint.h>
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#include "base/files/memory_mapped_file.h"
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#include "base/i18n/base_i18n_export.h"
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#include "build/build_config.h"
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#define ICU_UTIL_DATA_FILE 0
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#define ICU_UTIL_DATA_SHARED 1
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#define ICU_UTIL_DATA_STATIC 2
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namespace base {
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namespace i18n {
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#if !defined(OS_NACL)
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// Call this function to load ICU's data tables for the current process. This
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// function should be called before ICU is used.
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BASE_I18N_EXPORT bool InitializeICU();
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#if ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE
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#if defined(OS_ANDROID)
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// Returns the PlatformFile and Region that was initialized by InitializeICU().
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// Use with InitializeICUWithFileDescriptor().
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BASE_I18N_EXPORT PlatformFile GetIcuDataFileHandle(
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MemoryMappedFile::Region* out_region);
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// Android uses a file descriptor passed by browser process to initialize ICU
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// in render processes.
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BASE_I18N_EXPORT bool InitializeICUWithFileDescriptor(
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PlatformFile data_fd,
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const MemoryMappedFile::Region& data_region);
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#endif
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// Returns a void pointer to the memory mapped ICU data file.
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//
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// There are cases on Android where we would be unsafely reusing a file
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// descriptor within the same process when initializing two copies of ICU from
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// different binaries in the same address space. This returns an unowned
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// pointer to the memory mapped icu data file; consumers copies of base must
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// not outlive the copy of base that owns the memory mapped file.
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BASE_I18N_EXPORT const uint8_t* GetRawIcuMemory();
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// Initializes ICU memory
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//
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// This does nothing in component builds; this initialization should only be
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// done in cases where there could be two copies of base in a single process in
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// non-component builds. (The big example is standalone service libraries: the
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// Service Manager will have a copy of base linked in, and the majority of
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// service libraries will have base linked in but in non-component builds,
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// these will be separate copies of base.)
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BASE_I18N_EXPORT bool InitializeICUFromRawMemory(const uint8_t* raw_memory);
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#endif // ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE
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#endif // !defined(OS_NACL)
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// In a test binary, the call above might occur twice.
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BASE_I18N_EXPORT void AllowMultipleInitializeCallsForTesting();
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} // namespace i18n
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} // namespace base
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#endif // BASE_I18N_ICU_UTIL_H_
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