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