X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Fcompat%2Ffcntl-internal.h;fp=include%2Fbabeltrace%2Fcompat%2Ffcntl-internal.h;h=0000000000000000000000000000000000000000;hp=c5289430106f2d2df10c898e357a42020239209f;hb=3fadfbc0c91f82c46bd36e6e0657ea93570c9db1;hpb=7e69c04f557e46fb50e5a888a3bc3451afbd3b8e diff --git a/include/babeltrace/compat/fcntl-internal.h b/include/babeltrace/compat/fcntl-internal.h deleted file mode 100644 index c5289430..00000000 --- a/include/babeltrace/compat/fcntl-internal.h +++ /dev/null @@ -1,233 +0,0 @@ -#ifndef _BABELTRACE_COMPAT_FCNTL_H -#define _BABELTRACE_COMPAT_FCNTL_H - -/* - * Copyright 2015 (c) - Jérémie Galarneau - * - * fcntl compatibility layer. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#ifdef BABELTRACE_HAVE_POSIX_FALLOCATE - -#include - -static inline -int bt_posix_fallocate(int fd, off_t offset, off_t len) -{ - return posix_fallocate(fd, offset, len); -} - -#elif defined(__MINGW32__) /* #ifdef BABELTRACE_HAVE_POSIX_FALLOCATE */ - -#include -#include -#include - -static inline -int bt_posix_fallocate(int fd, off_t offset, off_t len) -{ - HANDLE handle; - LARGE_INTEGER pos, file_pos, orig_end_offset, range_end; - int ret = 0; - char zero = 0; - DWORD byteswritten; - - if (offset < 0 || len <= 0) { - ret = EINVAL; - goto end; - } - - range_end.QuadPart = (__int64) offset + (__int64) len; - - /* Get a handle from the fd */ - handle = (HANDLE) _get_osfhandle(fd); - if (handle == INVALID_HANDLE_VALUE) { - ret = EBADF; - goto end; - } - - /* Get the file original end offset */ - ret = GetFileSizeEx(handle, &orig_end_offset); - if (ret == 0) { - ret = EBADF; - goto end; - } - - /* Make sure we don't truncate the file */ - if (orig_end_offset.QuadPart >= range_end.QuadPart) { - ret = 0; - goto end; - } - - /* Get the current file pointer position */ - pos.QuadPart = 0; - ret = SetFilePointerEx(handle, pos, &file_pos, FILE_CURRENT); - if (ret == 0) { - ret = EBADF; - goto end; - } - - /* Move the file pointer to the new end offset */ - ret = SetFilePointerEx(handle, range_end, NULL, FILE_BEGIN); - if (ret == 0) { - ret = EBADF; - goto end; - } - - /* Sets the physical file size to the current position */ - ret = SetEndOfFile(handle); - if (ret == 0) { - ret = EINVAL; - goto restore; - } - - /* - * Move the file pointer back 1 byte, and write a single 0 at the - * last byte of the new end offset, the operating system will zero - * fill the file. - */ - pos.QuadPart = -1; - ret = SetFilePointerEx(handle, pos, NULL, FILE_END); - if (ret == 0) { - ret = EBADF; - goto end; - } - - ret = WriteFile(handle, &zero, 1, &byteswritten, NULL); - if (ret == 0 || byteswritten != 1) { - ret = ENOSPC; - } else { - ret = 0; - } - -restore: - /* Restore the original file pointer position */ - if (!SetFilePointerEx(handle, file_pos, NULL, FILE_BEGIN)) { - /* We moved the file pointer but failed to restore it. */ - abort(); - } - -end: - return ret; -} - -#else - -#include -#include -#include - -#define BABELTRACE_FALLOCATE_BUFLEN 256 - -#ifndef min_t -#define min_t(type, a, b) \ - ((type) (a) < (type) (b) ? (type) (a) : (type) (b)) -#endif - -static inline -int bt_posix_fallocate(int fd, off_t offset, off_t len) -{ - int ret = 0; - ssize_t copy_len; - char buf[BABELTRACE_FALLOCATE_BUFLEN]; - off_t i, file_pos, orig_end_offset, range_end; - - if (offset < 0 || len < 0) { - ret = EINVAL; - goto end; - } - - range_end = offset + len; - if (range_end < 0) { - ret = EFBIG; - goto end; - } - - file_pos = lseek(fd, 0, SEEK_CUR); - if (file_pos < 0) { - ret = errno; - goto end; - } - - orig_end_offset = lseek(fd, 0, SEEK_END); - if (orig_end_offset < 0) { - ret = errno; - goto end; - } - - /* Seek back to original position. */ - ret = lseek(fd, file_pos, SEEK_SET); - if (ret) { - ret = errno; - goto end; - } - - /* - * The file may not need to grow, but we want to ensure the - * space has actually been reserved by the file system. First, copy - * the "existing" region of the file, then grow the file if needed. - */ - for (i = file_pos; i < min_t(off_t, range_end, orig_end_offset); - i += copy_len) { - ssize_t copy_ret; - - copy_len = min_t(size_t, BABELTRACE_FALLOCATE_BUFLEN, - min_t(off_t, range_end - i, - orig_end_offset - i)); - copy_ret = pread(fd, &buf, copy_len, i); - if (copy_ret < copy_len) { - /* - * The caller must handle any EINTR. - * POSIX_FALLOCATE(3) does not mention EINTR. - * However, glibc does forward to fallocate() - * directly on Linux, which may be interrupted. - */ - ret = errno; - goto end; - } - - copy_ret = pwrite(fd, &buf, copy_len, i); - if (copy_ret < copy_len) { - /* Same caveat as noted at pread() */ - ret = errno; - goto end; - } - } - - /* Grow file, as necessary. */ - memset(&buf, 0, BABELTRACE_FALLOCATE_BUFLEN); - for (i = orig_end_offset; i < range_end; i += copy_len) { - ssize_t write_ret; - - copy_len = min_t(size_t, BABELTRACE_FALLOCATE_BUFLEN, - range_end - i); - write_ret = pwrite(fd, &buf, copy_len, i); - if (write_ret < copy_len) { - ret = errno; - goto end; - } - } -end: - return ret; -} -#endif /* #else #ifdef BABELTRACE_HAVE_POSIX_FALLOCATE */ - -#endif /* _BABELTRACE_COMPAT_FCNTL_H */