1 // Copyright (c) 2007, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // --- 31 // This file just provides storage for FLAGS_verbose. 32 33 #include <config.h> 34 #include "base/logging.h" 35 #include "base/commandlineflags.h" 36 37 DEFINE_int32(verbose, EnvToInt("PERFTOOLS_VERBOSE", 0), 38 "Set to numbers >0 for more verbose output, or <0 for less. " 39 "--verbose == -4 means we log fatal errors only."); 40 41 42 #if defined(_WIN32) || defined(__CYGWIN__) || defined(__CYGWIN32__) 43 44 // While windows does have a POSIX-compatible API 45 // (_open/_write/_close), it acquires memory. Using this lower-level 46 // windows API is the closest we can get to being "raw". 47 RawFD RawOpenForWriting(const char* filename) { 48 // CreateFile allocates memory if file_name isn't absolute, so if 49 // that ever becomes a problem then we ought to compute the absolute 50 // path on its behalf (perhaps the ntdll/kernel function isn't aware 51 // of the working directory?) 52 RawFD fd = CreateFileA(filename, GENERIC_WRITE, 0, NULL, 53 CREATE_ALWAYS, 0, NULL); 54 if (fd != kIllegalRawFD && GetLastError() == ERROR_ALREADY_EXISTS) 55 SetEndOfFile(fd); // truncate the existing file 56 return fd; 57 } 58 59 void RawWrite(RawFD handle, const char* buf, size_t len) { 60 while (len > 0) { 61 DWORD wrote; 62 BOOL ok = WriteFile(handle, buf, len, &wrote, NULL); 63 // We do not use an asynchronous file handle, so ok==false means an error 64 if (!ok) break; 65 buf += wrote; 66 len -= wrote; 67 } 68 } 69 70 void RawClose(RawFD handle) { 71 CloseHandle(handle); 72 } 73 74 #else // _WIN32 || __CYGWIN__ || __CYGWIN32__ 75 76 #ifdef HAVE_SYS_TYPES_H 77 #include <sys/types.h> 78 #endif 79 #ifdef HAVE_UNISTD_H 80 #include <unistd.h> 81 #endif 82 #ifdef HAVE_FCNTL_H 83 #include <fcntl.h> 84 #endif 85 86 // Re-run fn until it doesn't cause EINTR. 87 #define NO_INTR(fn) do {} while ((fn) < 0 && errno == EINTR) 88 89 RawFD RawOpenForWriting(const char* filename) { 90 return open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0664); 91 } 92 93 void RawWrite(RawFD fd, const char* buf, size_t len) { 94 while (len > 0) { 95 ssize_t r; 96 NO_INTR(r = write(fd, buf, len)); 97 if (r <= 0) break; 98 buf += r; 99 len -= r; 100 } 101 } 102 103 void RawClose(RawFD fd) { 104 NO_INTR(close(fd)); 105 } 106 107 #endif // _WIN32 || __CYGWIN__ || __CYGWIN32__ 108
