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- // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
- // Copyright (c) 2007, Google Inc.
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // modification, are permitted provided that the following conditions are
- // met:
- //
- // * Redistributions of source code must retain the above copyright
- // notice, this list of conditions and the following disclaimer.
- // * Redistributions in binary form must reproduce the above
- // copyright notice, this list of conditions and the following disclaimer
- // in the documentation and/or other materials provided with the
- // distribution.
- // * Neither the name of Google Inc. nor the names of its
- // contributors may be used to endorse or promote products derived from
- // this software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- // ---
- // This file just provides storage for FLAGS_verbose.
- #include <config.h>
- #include "base/logging.h"
- #include "base/commandlineflags.h"
- DEFINE_int32(verbose, EnvToInt("PERFTOOLS_VERBOSE", 0),
- "Set to numbers >0 for more verbose output, or <0 for less. "
- "--verbose == -4 means we log fatal errors only.");
- #if defined(_WIN32) || defined(__CYGWIN__) || defined(__CYGWIN32__)
- // While windows does have a POSIX-compatible API
- // (_open/_write/_close), it acquires memory. Using this lower-level
- // windows API is the closest we can get to being "raw".
- RawFD RawOpenForWriting(const char* filename) {
- // CreateFile allocates memory if file_name isn't absolute, so if
- // that ever becomes a problem then we ought to compute the absolute
- // path on its behalf (perhaps the ntdll/kernel function isn't aware
- // of the working directory?)
- RawFD fd = CreateFileA(filename, GENERIC_WRITE, 0, NULL,
- CREATE_ALWAYS, 0, NULL);
- if (fd != kIllegalRawFD && GetLastError() == ERROR_ALREADY_EXISTS)
- SetEndOfFile(fd); // truncate the existing file
- return fd;
- }
- void RawWrite(RawFD handle, const char* buf, size_t len) {
- while (len > 0) {
- DWORD wrote;
- BOOL ok = WriteFile(handle, buf, len, &wrote, NULL);
- // We do not use an asynchronous file handle, so ok==false means an error
- if (!ok) break;
- buf += wrote;
- len -= wrote;
- }
- }
- void RawClose(RawFD handle) {
- CloseHandle(handle);
- }
- #else // _WIN32 || __CYGWIN__ || __CYGWIN32__
- #ifdef HAVE_SYS_TYPES_H
- #include <sys/types.h>
- #endif
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #ifdef HAVE_FCNTL_H
- #include <fcntl.h>
- #endif
- // Re-run fn until it doesn't cause EINTR.
- #define NO_INTR(fn) do {} while ((fn) < 0 && errno == EINTR)
- RawFD RawOpenForWriting(const char* filename) {
- return open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0664);
- }
- void RawWrite(RawFD fd, const char* buf, size_t len) {
- while (len > 0) {
- ssize_t r;
- NO_INTR(r = write(fd, buf, len));
- if (r <= 0) break;
- buf += r;
- len -= r;
- }
- }
- void RawClose(RawFD fd) {
- NO_INTR(close(fd));
- }
- #endif // _WIN32 || __CYGWIN__ || __CYGWIN32__
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