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Stable release v32.1bitcoin/bitcoin · f0de87f04062 ↗3,020 source files · 47.5 MB stored on the server440 file guides

Release published 2026-10-28 · Snapshot fetched 2026-11-01. Latest stable release at fetch time; development branches and Git history are excluded. Only the selected code window and visible folders load here.

bitcoin / bitcoinstable

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▤ env_posix_test_helper.h

▤ env_posix_test.cc

▤ env_posix.cc

▤ env_test.cc

▤ env_windows_test_helper.h

▤ env_windows_test.cc

▤ no_destructor_test.cc

▤ arith_uint256.hGuide

▤ bitcoin-chainstate.cpp

▤ bitcoin-cli-res.rc

▤ bitcoin-cli.cppGuide

▤ bitcoin-res.rc

▤ bitcoin-tx-res.rc

▤ bitcoin-tx.cpp

▤ bitcoin-util-res.rc

▤ bitcoin-util.cpp

▤ bitcoin-wallet-res.rc

▤ blockencodings.cppGuide

▤ blockencodings.hGuide

▤ blockfilter.cppGuide

▤ blockfilter.hGuide

▤ chain.cppGuide

▤ chain.h

▤ chainparams.cppGuide

▤ chainparams.hGuide

▤ chainparamsbase.cppGuide

▤ chainparamsbase.hGuide

▤ chainparamsseeds.h

▤ checkqueue.hGuide

▤ clientversion.cppGuide

▤ clientversion.hGuide

▤ cluster_linearize.h

▤ CMakeLists.txt

▤ coins.cppGuide

▤ coins.hGuide

▤ compressor.cppGuide

▤ compressor.hGuide

▤ core_io.cpp

▤ core_io.hGuide

▤ core_memusage.hGuide

▤ cuckoocache.h

▤ dbwrapper.cpp

▤ dbwrapper.hGuide

▤ deploymentinfo.cppGuide

▤ deploymentinfo.hGuide

▤ deploymentstatus.cppGuide

▤ deploymentstatus.hGuide

▤ dummywallet.cppGuide

▤ external_signer.cpp

▤ external_signer.hGuide

▤ merkleblock.cppGuide

▤ merkleblock.hGuide

▤ musig.cpp

▤ musig.hGuide

▤ net_permissions.cppGuide

▤ net_permissions.hGuide

▤ net_processing.cppGuide

▤ netaddress.cppGuide

▤ netmessagemaker.hGuide

▤ noui.cppGuide

▤ noui.hGuide

▤ outputtype.cppGuide

▤ private_broadcast.cpp

▤ private_broadcast.h

▤ semaphore_grant.hGuide

▤ threadsafety.hGuide

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▤ validation.cppGuide

▤ validation.h

▤ validationinterface.cpp

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▤ versionbits_impl.hGuide

▤ versionbits.cpp

▤ versionbits.hGuide

▤ walletinitinterface.hGuide

▤ CMakeLists.txtGuide

▤ libbitcoinkernel.pc.in

bitcoin / src / leveldb / util / env_windows.cc

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27,741 bytes · SHA-256 84e66de81af8fec6… · View upstream ↗

251};
252
253class WindowsWritableFile : public WritableFile {
254 public:
255  WindowsWritableFile(std::string filename, ScopedHandle handle)
256      : pos_(0), handle_(std::move(handle)), filename_(std::move(filename)) {}
257
258  ~WindowsWritableFile() override = default;
259
260  Status Append(const Slice& data) override {
261    size_t write_size = data.size();
262    const char* write_data = data.data();
263
264    // Fit as much as possible into buffer.
265    size_t copy_size = std::min(write_size, kWritableFileBufferSize - pos_);
266    std::memcpy(buf_ + pos_, write_data, copy_size);
267    write_data += copy_size;
268    write_size -= copy_size;
269    pos_ += copy_size;
270    if (write_size == 0) {
271      return Status::OK();
272    }
273
274    // Can't fit in buffer, so need to do at least one write.
275    Status status = FlushBuffer();
276    if (!status.ok()) {
277      return status;
278    }
279
280    // Small writes go to buffer, large writes are written directly.
281    if (write_size < kWritableFileBufferSize) {
282      std::memcpy(buf_, write_data, write_size);
283      pos_ = write_size;
284      return Status::OK();
285    }
286    return WriteUnbuffered(write_data, write_size);
287  }
288
289  Status Close() override {
290    Status status = FlushBuffer();
291    if (!handle_.Close() && status.ok()) {
292      status = WindowsError(filename_, ::GetLastError());
293    }
294    return status;
295  }
296
297  Status Flush() override { return FlushBuffer(); }
298
299  Status Sync() override {
300    // On Windows no need to sync parent directory. Its metadata will be updated
301    // via the creation of the new file, without an explicit sync.
302
303    Status status = FlushBuffer();
304    if (!status.ok()) {
305      return status;
306    }
307
308    if (!::FlushFileBuffers(handle_.get())) {
309      return Status::IOError(filename_,
310                             GetWindowsErrorMessage(::GetLastError()));
311    }
312    return Status::OK();
313  }
314
315  std::string GetName() const override { return filename_; }
316
317 private:
318  Status FlushBuffer() {
319    Status status = WriteUnbuffered(buf_, pos_);
320    pos_ = 0;
321    return status;
322  }
323
324  Status WriteUnbuffered(const char* data, size_t size) {
325    DWORD bytes_written;
326    if (!::WriteFile(handle_.get(), data, static_cast<DWORD>(size),
327                     &bytes_written, nullptr)) {
328      return Status::IOError(filename_,
329                             GetWindowsErrorMessage(::GetLastError()));
330    }
331    return Status::OK();
332  }
333
334  // buf_[0, pos_-1] contains data to be written to handle_.
335  char buf_[kWritableFileBufferSize];
336  size_t pos_;
337
338  ScopedHandle handle_;
339  const std::string filename_;
340};
341
342// Lock or unlock the entire file as specified by |lock|. Returns true
343// when successful, false upon failure. Caller should call ::GetLastError()
344// to determine cause of failure
345bool LockOrUnlock(HANDLE handle, bool lock) {
346  if (lock) {
347    return ::LockFile(handle,
348                      /*dwFileOffsetLow=*/0, /*dwFileOffsetHigh=*/0,
349                      /*nNumberOfBytesToLockLow=*/MAXDWORD,
350                      /*nNumberOfBytesToLockHigh=*/MAXDWORD);
351  } else {
352    return ::UnlockFile(handle,
353                        /*dwFileOffsetLow=*/0, /*dwFileOffsetHigh=*/0,
354                        /*nNumberOfBytesToLockLow=*/MAXDWORD,
355                        /*nNumberOfBytesToLockHigh=*/MAXDWORD);
356  }
357}
358
359class WindowsFileLock : public FileLock {
360 public:
361  WindowsFileLock(ScopedHandle handle, std::string filename)
362      : handle_(std::move(handle)), filename_(std::move(filename)) {}
363
364  const ScopedHandle& handle() const { return handle_; }
365  const std::string& filename() const { return filename_; }
366
367 private:
368  const ScopedHandle handle_;
369  const std::string filename_;
370};
371
372class WindowsEnv : public Env {
373 public:
374  WindowsEnv();
375  ~WindowsEnv() override {
376    static const char msg[] =
377        "WindowsEnv singleton destroyed. Unsupported behavior!\n";
378    std::fwrite(msg, 1, sizeof(msg), stderr);
379    std::abort();
380  }
381
382  Status NewSequentialFile(const std::string& filename,
383                           SequentialFile** result) override {
384    *result = nullptr;
385    DWORD desired_access = GENERIC_READ;
386    DWORD share_mode = FILE_SHARE_READ;
387    auto wFilename = toUtf16(filename);
388    ScopedHandle handle = ::CreateFileW(
389        wFilename.c_str(), desired_access, share_mode,
390        /*lpSecurityAttributes=*/nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
391        /*hTemplateFile=*/nullptr);
392    if (!handle.is_valid()) {
393      return WindowsError(filename, ::GetLastError());
394    }
395
396    *result = new WindowsSequentialFile(filename, std::move(handle));
397    return Status::OK();
398  }
399
400  Status NewRandomAccessFile(const std::string& filename,
401                             RandomAccessFile** result) override {
402    *result = nullptr;
403    DWORD desired_access = GENERIC_READ;
404    DWORD share_mode = FILE_SHARE_READ;
405    auto wFilename = toUtf16(filename);
406    ScopedHandle handle =
407        ::CreateFileW(wFilename.c_str(), desired_access, share_mode,
408                      /*lpSecurityAttributes=*/nullptr, OPEN_EXISTING,
409                      FILE_ATTRIBUTE_READONLY,
410                      /*hTemplateFile=*/nullptr);
411    if (!handle.is_valid()) {
412      return WindowsError(filename, ::GetLastError());
413    }
414    if (!mmap_limiter_.Acquire()) {
415      *result = new WindowsRandomAccessFile(filename, std::move(handle));
416      return Status::OK();
417    }
418
419    LARGE_INTEGER file_size;
420    Status status;
421    if (!::GetFileSizeEx(handle.get(), &file_size)) {
422      mmap_limiter_.Release();
423      return WindowsError(filename, ::GetLastError());
424    }
425
426    ScopedHandle mapping =
427        ::CreateFileMappingW(handle.get(),
428                             /*security attributes=*/nullptr, PAGE_READONLY,
429                             /*dwMaximumSizeHigh=*/0,
430                             /*dwMaximumSizeLow=*/0,
431                             /*lpName=*/nullptr);
432    if (mapping.is_valid()) {
433      void* mmap_base = ::MapViewOfFile(mapping.get(), FILE_MAP_READ,
434                                        /*dwFileOffsetHigh=*/0,
435                                        /*dwFileOffsetLow=*/0,
436                                        /*dwNumberOfBytesToMap=*/0);
437      if (mmap_base) {
438        *result = new WindowsMmapReadableFile(
439            filename, reinterpret_cast<char*>(mmap_base),
440            static_cast<size_t>(file_size.QuadPart), &mmap_limiter_);
441        return Status::OK();
442      }
443    }
444    mmap_limiter_.Release();
445    return WindowsError(filename, ::GetLastError());
446  }
447
448  Status NewWritableFile(const std::string& filename,
449                         WritableFile** result) override {
450    DWORD desired_access = GENERIC_WRITE;
451    DWORD share_mode = 0;  // Exclusive access.
452    auto wFilename = toUtf16(filename);
453    ScopedHandle handle = ::CreateFileW(
454        wFilename.c_str(), desired_access, share_mode,
455        /*lpSecurityAttributes=*/nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
456        /*hTemplateFile=*/nullptr);
457    if (!handle.is_valid()) {
458      *result = nullptr;
459      return WindowsError(filename, ::GetLastError());
460    }
461
462    *result = new WindowsWritableFile(filename, std::move(handle));
463    return Status::OK();
464  }
465
466  Status NewAppendableFile(const std::string& filename,
467                           WritableFile** result) override {
468    DWORD desired_access = FILE_APPEND_DATA;
469    DWORD share_mode = 0;  // Exclusive access.
470    auto wFilename = toUtf16(filename);
471    ScopedHandle handle = ::CreateFileW(
472        wFilename.c_str(), desired_access, share_mode,
473        /*lpSecurityAttributes=*/nullptr, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL,
474        /*hTemplateFile=*/nullptr);
475    if (!handle.is_valid()) {
476      *result = nullptr;
477      return WindowsError(filename, ::GetLastError());
478    }
479
480    *result = new WindowsWritableFile(filename, std::move(handle));
481    return Status::OK();
482  }
483
484  bool FileExists(const std::string& filename) override {
485    auto wFilename = toUtf16(filename);
486    return GetFileAttributesW(wFilename.c_str()) != INVALID_FILE_ATTRIBUTES;
487  }
488
489  Status GetChildren(const std::string& directory_path,
490                     std::vector<std::string>* result) override {
491    const std::string find_pattern = directory_path + "\\*";
492    WIN32_FIND_DATAW find_data;
493    auto wFind_pattern = toUtf16(find_pattern);
494    HANDLE dir_handle = ::FindFirstFileW(wFind_pattern.c_str(), &find_data);
495    if (dir_handle == INVALID_HANDLE_VALUE) {
496      DWORD last_error = ::GetLastError();
497      if (last_error == ERROR_FILE_NOT_FOUND) {
498        return Status::OK();
499      }
500      return WindowsError(directory_path, last_error);

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This file is included in the stable source snapshot. A file-specific guide has not been published yet.

440 guided files · 2,580 pending. Guides cover key sections, not every line.

cmake/bitcoin-build-config.h.in src/consensus/amount.h src/consensus/consensus.h src/primitives/block.h src/primitives/transaction.h src/crypto/sha256.h src/util/moneystr.h src/clientversion.h src/uint256.h src/script/script.h src/policy/policy.h CMakeLists.txt README.md COPYING src/consensus/tx_check.cpp src/consensus/tx_verify.cpp src/consensus/merkle.cpp src/pow.cpp src/validation.cpp src/script/interpreter.cpp src/script/solver.cpp src/script/sign.cpp src/key_io.cpp src/net.cpp src/net_processing.cpp src/netaddress.cpp src/protocol.h src/wallet/wallet.cpp src/wallet/spend.cpp

← Previous 250 linesCode page 2Next 250 lines →

src/wallet/receive.cpp

src/wallet/coinselection.cpp

src/consensus/validation.h

src/primitives/transaction.cpp

src/script/descriptor.cpp

src/bitcoin-cli.cpp

src/rpc/blockchain.cpp

src/rpc/rawtransaction.cpp

src/init.cpp

src/crypto/sha256.cpp

src/consensus/merkle.h

src/consensus/tx_check.h

src/consensus/tx_verify.h

src/policy/feerate.h

src/policy/feerate.cpp

src/primitives/transaction_identifier.h

src/chainparamsbase.h

src/chainparamsbase.cpp

src/util/moneystr.cpp

src/crypto/ripemd160.h

src/crypto/sha1.h

src/crypto/sha512.h

src/crypto/hmac_sha256.h

src/crypto/hmac_sha512.h

src/crypto/hmac_sha256.cpp

src/crypto/hmac_sha512.cpp

src/crypto/hkdf_sha256_32.h

src/crypto/hkdf_sha256_32.cpp

src/support/cleanse.h

src/support/cleanse.cpp

src/crypto/siphash.cpp

src/crypto/muhash.h

src/crypto/chacha20.h

src/crypto/poly1305.h

src/crypto/chacha20poly1305.h

src/crypto/chacha20poly1305.cpp

src/util/chaintype.cpp

src/util/obfuscation.h

src/util/byte_units.h

src/util/overflow.h

src/blockencodings.cpp

src/net_permissions.cpp

src/policy/packages.cpp

src/policy/rbf.cpp

src/policy/truc_policy.cpp

src/policy/ephemeral_policy.cpp

src/policy/settings.cpp

src/policy/policy.cpp

src/node/transaction.cpp

src/node/coin.cpp

src/rpc/client.cpp

src/rpc/external_signer.cpp

src/rpc/request.cpp

src/rpc/server_util.cpp

src/rpc/fees.cpp

src/rpc/output_script.cpp

src/rpc/rawtransaction_util.cpp

src/rpc/rawtransaction_util.h

src/rpc/register.h

src/rpc/request.h

src/rpc/server_util.h

src/rpc/protocol.h

src/rpc/server.h

src/rpc/signmessage.cpp

src/rpc/txoutproof.cpp

src/rpc/util.cpp

src/rpc/util.h

src/wallet/rpc/addresses.cpp

src/wallet/rpc/backup.cpp

src/wallet/rpc/coins.cpp

src/wallet/rpc/encrypt.cpp

src/wallet/rpc/signmessage.cpp

src/wallet/rpc/util.cpp

src/wallet/rpc/util.h

src/wallet/coincontrol.cpp

src/wallet/coincontrol.h

src/wallet/context.cpp

src/wallet/context.h

src/wallet/crypter.cpp

src/wallet/crypter.h

src/wallet/db.cpp

src/wallet/export.cpp

src/wallet/external_signer_scriptpubkeyman.cpp

src/wallet/rpc/spend.cpp

src/wallet/rpc/transactions.cpp

src/wallet/rpc/wallet.cpp

src/wallet/feebumper.cpp

src/wallet/feebumper.h

src/index/base.h

src/index/base.cpp

src/index/txindex.h

src/index/txindex.cpp

src/index/txindex_key.h

src/index/txospenderindex.h

src/index/txospenderindex.cpp

src/index/blockfilterindex.h

src/index/blockfilterindex.cpp

src/index/coinstatsindex.h

src/index/coinstatsindex.cpp

src/index/db_key.h

src/index/disktxpos.h

src/kernel/chain.cpp

src/kernel/chain.h

src/kernel/checks.cpp

src/kernel/checks.h

src/kernel/context.cpp

src/kernel/context.h

src/kernel/cs_main.cpp

src/kernel/cs_main.h

src/kernel/disconnected_transactions.cpp

src/kernel/disconnected_transactions.h

src/kernel/mempool_removal_reason.cpp

src/kernel/mempool_removal_reason.h

src/kernel/coinstats.cpp

src/kernel/coinstats.h

src/kernel/chainparams.cpp

src/kernel/chainparams.h

src/wallet/sqlite.cpp

src/wallet/sqlite.h

src/wallet/transaction.cpp

src/wallet/transaction.h

src/wallet/dump.cpp

src/wallet/dump.h

src/wallet/init.cpp

src/wallet/walletutil.cpp

src/wallet/walletutil.h

src/wallet/wallettool.cpp

src/wallet/wallettool.h

src/wallet/export.h

src/wallet/migrate.cpp

src/wallet/migrate.h

src/wallet/db.h

src/wallet/walletdb.cpp

src/wallet/interfaces.cpp

src/wallet/scriptpubkeyman.cpp

src/wallet/scriptpubkeyman.h

src/kernel/bitcoinkernel.cpp

src/kernel/bitcoinkernel.h

src/kernel/bitcoinkernel_wrapper.h

src/node/chainstate.cpp

src/node/chainstate.h

src/node/blockstorage.cpp

src/node/blockstorage.h

src/node/mempool_persist.cpp

src/node/mempool_persist.h

src/node/utxo_snapshot.cpp

src/node/utxo_snapshot.h

src/node/kernel_notifications.cpp

src/node/kernel_notifications.h

src/node/blockmanager_args.cpp

src/kernel/blockmanager_opts.h

src/util/expected.cpp

src/policy/settings.h

src/util/types.h

src/kernel/messagestartchars.h

src/kernel/warning.h

src/util/exception.h

src/common/license_info.h

src/node/coins_view_args.h

src/node/database_args.h

src/util/batchpriority.h

src/util/ui_change_type.h

src/node/coins_view_args.cpp

src/node/peerman_args.h

src/util/serfloat.h

src/node/blockmanager_args.h

src/node/database_args.cpp

src/util/overloaded.h

src/interfaces/types.h

src/node/chainstatemanager_args.h

src/node/minisketchwrapper.h

src/util/macros.h

src/util/syserror.h

src/common/run_command.h

src/util/bytevectorhash.cpp

src/node/mempool_persist_args.cpp

src/util/exec.h

src/util/rbf.h

src/crypto/hex_base.h

src/node/mempool_persist_args.h

src/interfaces/echo.h

src/util/any.h

src/util/batchpriority.cpp

src/util/threadnames.h

src/node/coin.h

src/node/mempool_args.h

src/util/asmap.h

src/util/bytevectorhash.h

src/node/context.cpp

src/util/insert.h

src/util/readwritefile.h

src/node/peerman_args.cpp

src/node/interface_ui.cpp

src/interfaces/handler.h

src/node/mining_args.h

src/util/hasher.cpp

src/common/init.h

src/kernel/mempool_limits.h

src/common/system.h

src/crypto/sha3.h

src/util/threadinterrupt.cpp

src/node/protocol_version.h

src/util/exception.cpp

src/common/messages.h

src/node/connection_types.cpp

src/util/bip32.h

src/common/license_info.cpp

src/util/stdmutex.h

src/common/run_command.cpp

src/util/check.cpp

src/util/golombrice.h

src/node/types.h

src/node/timeoffsets.h

src/util/readwritefile.cpp

src/util/fastrange.h

src/util/signalinterrupt.h

src/util/task_runner.h

src/util/syserror.cpp

src/common/interfaces.cpp

src/common/types.h

src/util/threadinterrupt.h

src/kernel/chainstatemanager_opts.h

src/node/psbt.h

src/policy/ephemeral_policy.h

src/util/trace.h

src/common/url.cpp

src/kernel/mempool_options.h

src/util/serfloat.cpp

src/kernel/notifications_interface.h

src/node/timeoffsets.cpp

src/node/warnings.cpp

src/util/hash_type.h

src/crypto/hex_base.cpp

src/node/eviction.h

src/util/tokenbucket.h

src/crypto/aes.h

src/common/pcp.h

src/util/feefrac.cpp

src/node/transaction.h

src/util/threadnames.cpp

src/common/signmessage.h

src/util/exec.cpp

src/util/signalinterrupt.cpp

src/clientversion.cpp

src/common/signmessage.cpp

src/compat/assumptions.h

src/compat/byteswap.h

src/deploymentinfo.cpp

src/deploymentinfo.h

src/deploymentstatus.cpp

src/deploymentstatus.h

src/dummywallet.cpp

src/external_signer.h

src/init/bitcoin-gui.cpp

src/init/bitcoin-node.cpp

src/init/bitcoin-qt.cpp

src/init/bitcoin-wallet.cpp

src/init/bitcoind.cpp

src/init/common.h

src/interfaces/init.h

src/interfaces/ipc.h

src/key_io.h

src/logging/categories.h

src/logging/timer.h

src/mapport.h

src/musig.h

src/net_permissions.h

src/netgroup.h

src/netmessagemaker.h

src/node/chainstatemanager_args.cpp

src/node/connection_types.h

src/node/context.h

src/node/interface_ui.h

src/node/mempool_args.cpp

src/node/mining_args.cpp

src/node/minisketchwrapper.cpp

src/node/txreconciliation.h

src/policy/fees/estimator_args.cpp

src/policy/fees/estimator_args.h

src/policy/fees/estimator_man.cpp

src/policy/fees/estimator_man.h

src/policy/packages.h

src/policy/rbf.h

src/policy/truc_policy.h

src/pow.h

src/primitives/block.cpp

src/randomenv.h

src/rest.h

src/script/keyorigin.h

src/script/parsing.cpp

src/script/parsing.h

src/script/script_error.h

src/script/sigcache.cpp

src/script/sigcache.h

src/script/solver.h

src/script/verify_flags.h

src/semaphore_grant.h

src/signet.h

src/span.h

src/support/allocators/secure.h

src/support/allocators/zeroafterfree.h

src/util/tokenpipe.cpp

src/util/translation.h

src/util/vector.h

src/versionbits.h

src/versionbits_impl.h

src/wallet/external_signer_scriptpubkeyman.h

src/wallet/fees.h

src/wallet/load.h

src/wallet/receive.h

src/wallet/rpc/wallet.h

src/wallet/types.h

src/walletinitinterface.h

src/zmq/zmqabstractnotifier.cpp

Independent explanations by MyBitcoinExplorer. Not affiliated with or endorsed by Bitcoin Core. Guides are educational and do not replace the source or its tests.

Bitcoin Core source © its contributors, distributed under the MIT license. Original notices and bundled third-party licenses are retained in the source tree.