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C
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#include <assert.h>#include <errno.h>#include <fcntl.h>#include <stdint.h>#include <stdlib.h>#include <sys/types.h>#include <sys/stat.h>#include <limits.h>
#include "mpv_talloc.h"
#include "config.h"#include "common/common.h"#include "misc/random.h"#include "osdep/io.h"#include "osdep/terminal.h"
#if HAVE_UWP// Missing from MinGW headers.#include <windows.h>WINBASEAPI UINT WINAPI GetTempFileNameW(LPCWSTR lpPathName, LPCWSTR lpPrefixString, UINT uUnique, LPWSTR lpTempFileName);WINBASEAPI DWORD WINAPI GetCurrentDirectoryW(DWORD nBufferLength, LPWSTR lpBuffer);WINBASEAPI DWORD WINAPI GetFullPathNameW(LPCWSTR lpFileName, DWORD nBufferLength, LPWSTR lpBuffer, LPWSTR *lpFilePart);#endif
// Set the CLOEXEC flag on the given fd.// On error, false is returned (and errno set).bool mp_set_cloexec(int fd){#if defined(F_SETFD) if (fd >= 0) { int flags = fcntl(fd, F_GETFD); if (flags == -1) return false; if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) return false; }#endif return true;}
#ifndef _WIN32int mp_make_cloexec_pipe(int pipes[2]){ if (pipe(pipes) != 0) { pipes[0] = pipes[1] = -1; return -1; }
for (int i = 0; i < 2; i++) mp_set_cloexec(pipes[i]); return 0;}
// create a pipe, and set it to non-blocking (and also set FD_CLOEXEC)int mp_make_wakeup_pipe(int pipes[2]){ if (mp_make_cloexec_pipe(pipes) < 0) return -1;
for (int i = 0; i < 2; i++) { int val = fcntl(pipes[i], F_GETFL) | O_NONBLOCK; fcntl(pipes[i], F_SETFL, val); } return 0;}
void mp_flush_wakeup_pipe(int pipe_end){ char buf[100]; (void)read(pipe_end, buf, sizeof(buf));}#endif
#ifdef _WIN32
#include <windows.h>#include <wchar.h>#include <stdio.h>#include <stddef.h>
#include "osdep/windows_utils.h"
//copied and modified from libav//http://git.libav.org/?p=libav.git;a=blob;f=libavformat/os_support.c;h=a0fcd6c9ba2be4b0dbcc476f6c53587345cc1152;hb=HEADl30
wchar_t *mp_from_utf8(void *talloc_ctx, const char *s){ int count = MultiByteToWideChar(CP_UTF8, 0, s, -1, NULL, 0); if (count <= 0) abort(); wchar_t *ret = talloc_array(talloc_ctx, wchar_t, count); MultiByteToWideChar(CP_UTF8, 0, s, -1, ret, count); return ret;}
char *mp_to_utf8(void *talloc_ctx, const wchar_t *s){ int count = WideCharToMultiByte(CP_UTF8, 0, s, -1, NULL, 0, NULL, NULL); if (count <= 0) abort(); char *ret = talloc_array(talloc_ctx, char, count); WideCharToMultiByte(CP_UTF8, 0, s, -1, ret, count, NULL, NULL); return ret;}
#endif // _WIN32
#ifdef _WIN32
#include <stdatomic.h>
#include <io.h>#include <fcntl.h>
#include "osdep/threads.h"#include "osdep/getpid.h"
static void set_errno_from_lasterror(void){ // This just handles the error codes expected from CreateFile at the moment switch (GetLastError()) { case ERROR_FILE_NOT_FOUND: errno = ENOENT; break; case ERROR_SHARING_VIOLATION: case ERROR_ACCESS_DENIED: errno = EACCES; break; case ERROR_FILE_EXISTS: case ERROR_ALREADY_EXISTS: errno = EEXIST; break; case ERROR_PIPE_BUSY: errno = EAGAIN; break; default: errno = EINVAL; break; }}
static time_t filetime_to_unix_time(int64_t wintime){ static const int64_t hns_per_second = 10000000ll; static const int64_t win_to_unix_epoch = 11644473600ll; return wintime / hns_per_second - win_to_unix_epoch;}
static bool get_file_ids_win8(HANDLE h, dev_t *dev, ino_t *ino){ FILE_ID_INFO ii; if (!GetFileInformationByHandleEx(h, FileIdInfo, &ii, sizeof(ii))) return false; *dev = ii.VolumeSerialNumber; // The definition of FILE_ID_128 differs between mingw-w64 and the Windows // SDK, but we can ignore that by just memcpying it. This will also // truncate the file ID on 32-bit Windows, which doesn't support __int128. // 128-bit file IDs are only used for ReFS, so that should be okay. static_assert(sizeof(*ino) <= sizeof(ii.FileId), ""); memcpy(ino, &ii.FileId, sizeof(*ino)); return true;}
#if HAVE_UWPstatic bool get_file_ids(HANDLE h, dev_t *dev, ino_t *ino){ return false;}#elsestatic bool get_file_ids(HANDLE h, dev_t *dev, ino_t *ino){ // GetFileInformationByHandle works on FAT partitions and Windows 7, but // doesn't work in UWP and can produce non-unique IDs on ReFS BY_HANDLE_FILE_INFORMATION bhfi; if (!GetFileInformationByHandle(h, &bhfi)) return false; *dev = bhfi.dwVolumeSerialNumber; *ino = ((ino_t)bhfi.nFileIndexHigh << 32) | bhfi.nFileIndexLow; return true;}#endif
// Like fstat(), but with a Windows HANDLEstatic int hstat(HANDLE h, struct mp_stat *buf){ // Handle special (or unknown) file types first switch (GetFileType(h) & ~FILE_TYPE_REMOTE) { case FILE_TYPE_PIPE: *buf = (struct mp_stat){ .st_nlink = 1, .st_mode = _S_IFIFO | 0644 }; return 0; case FILE_TYPE_CHAR: // character device *buf = (struct mp_stat){ .st_nlink = 1, .st_mode = _S_IFCHR | 0644 }; return 0; case FILE_TYPE_UNKNOWN: errno = EBADF; return -1; }
struct mp_stat st = { 0 };
FILE_BASIC_INFO bi; if (!GetFileInformationByHandleEx(h, FileBasicInfo, &bi, sizeof(bi))) { errno = EBADF; return -1; } st.st_atime = filetime_to_unix_time(bi.LastAccessTime.QuadPart); st.st_mtime = filetime_to_unix_time(bi.LastWriteTime.QuadPart); st.st_ctime = filetime_to_unix_time(bi.ChangeTime.QuadPart);
FILE_STANDARD_INFO si; if (!GetFileInformationByHandleEx(h, FileStandardInfo, &si, sizeof(si))) { errno = EBADF; return -1; } st.st_nlink = si.NumberOfLinks;
// Here we pretend Windows has POSIX permissions by pretending all // directories are 755 and regular files are 644 if (si.Directory) { st.st_mode |= _S_IFDIR | 0755; } else { st.st_mode |= _S_IFREG | 0644; st.st_size = si.EndOfFile.QuadPart; }
if (!get_file_ids_win8(h, &st.st_dev, &st.st_ino)) { // Fall back to the Windows 7 method (also used for FAT in Win8) if (!get_file_ids(h, &st.st_dev, &st.st_ino)) { errno = EBADF; return -1; } }
*buf = st; return 0;}
int mp_stat(const char *path, struct mp_stat *buf){ wchar_t *wpath = mp_from_utf8(NULL, path); HANDLE h = CreateFileW(wpath, FILE_READ_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | SECURITY_SQOS_PRESENT | SECURITY_IDENTIFICATION, NULL); talloc_free(wpath); if (h == INVALID_HANDLE_VALUE) { set_errno_from_lasterror(); return -1; }
int ret = hstat(h, buf); CloseHandle(h); return ret;}
int mp_fstat(int fd, struct mp_stat *buf){ HANDLE h = (HANDLE)_get_osfhandle(fd); if (h == INVALID_HANDLE_VALUE) { errno = EBADF; return -1; } // Use mpv's hstat() function rather than MSVCRT's fstat() because mpv's // supports directories and device/inode numbers. return hstat(h, buf);}
static inline HANDLE get_handle(FILE *stream){ HANDLE wstream = INVALID_HANDLE_VALUE;
if (stream == stdout || stream == stderr) { wstream = GetStdHandle(stream == stdout ? STD_OUTPUT_HANDLE : STD_ERROR_HANDLE); } return wstream;}
size_t mp_fwrite(const void *restrict buffer, size_t size, size_t count, FILE *restrict stream){ if (!size || !count) return 0;
HANDLE wstream = get_handle(stream); if (mp_check_console(wstream)) { unsigned char *start = (unsigned char *)buffer; size_t c = 0; for (; c < count; ++c) { if (mp_console_write(wstream, (bstr){start, size}) <= 0) break; start += size; } return c; }
#undef fwrite return fwrite(buffer, size, count, stream);}
#if HAVE_UWPPRINTF_ATTRIBUTE(2, 0)static int mp_vfprintf(FILE *stream, const char *format, va_list args){ return vfprintf(stream, format, args);}#else
PRINTF_ATTRIBUTE(2, 0)static int mp_vfprintf(FILE *stream, const char *format, va_list args){ HANDLE wstream = get_handle(stream); if (mp_check_console(wstream)) return mp_console_vfprintf(wstream, format, args);
return vfprintf(stream, format, args);}#endif
int mp_fprintf(FILE *stream, const char *format, ...){ int res; va_list args; va_start(args, format); res = mp_vfprintf(stream, format, args); va_end(args); return res;}
int mp_printf(const char *format, ...){ int res; va_list args; va_start(args, format); res = mp_vfprintf(stdout, format, args); va_end(args); return res;}
int mp_open(const char *filename, int oflag, ...){ // Always use all share modes, which is useful for opening files that are // open in other processes, and also more POSIX-like static const DWORD share = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE; // Setting FILE_APPEND_DATA and avoiding GENERIC_WRITE/FILE_WRITE_DATA // will make the file handle use atomic append behavior // However to implement ftruncate we need FILE_WRITE_DATA static const DWORD append = FILE_APPEND_DATA | FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA | FILE_WRITE_DATA;
DWORD access = 0; DWORD disposition = 0; DWORD flags = 0;
switch (oflag & (_O_RDONLY | _O_RDWR | _O_WRONLY | _O_APPEND)) { case _O_RDONLY: access = GENERIC_READ; flags |= FILE_FLAG_BACKUP_SEMANTICS; // For opening directories break; case _O_RDWR: access = GENERIC_READ | GENERIC_WRITE; break; case _O_RDWR | _O_APPEND: case _O_RDONLY | _O_APPEND: access = GENERIC_READ | append; break; case _O_WRONLY: access = GENERIC_WRITE; break; case _O_WRONLY | _O_APPEND: access = append; break; default: errno = EINVAL; return -1; }
switch (oflag & (_O_CREAT | _O_EXCL | _O_TRUNC)) { case 0: case _O_EXCL: // Like MSVCRT, ignore invalid use of _O_EXCL disposition = OPEN_EXISTING; break; case _O_TRUNC: case _O_TRUNC | _O_EXCL: disposition = TRUNCATE_EXISTING; break; case _O_CREAT: disposition = OPEN_ALWAYS; flags |= FILE_ATTRIBUTE_NORMAL; break; case _O_CREAT | _O_TRUNC: disposition = CREATE_ALWAYS; break; case _O_CREAT | _O_EXCL: case _O_CREAT | _O_EXCL | _O_TRUNC: disposition = CREATE_NEW; flags |= FILE_ATTRIBUTE_NORMAL; break; }
// Opening a named pipe as a file can allow the pipe server to impersonate // mpv's process, which could be a security issue. Set SQOS flags, so pipe // servers can only identify the mpv process, not impersonate it. if (disposition != CREATE_NEW) flags |= SECURITY_SQOS_PRESENT | SECURITY_IDENTIFICATION;
// Keep the same semantics for some MSVCRT-specific flags if (oflag & _O_TEMPORARY) { flags |= FILE_FLAG_DELETE_ON_CLOSE; access |= DELETE; } if (oflag & _O_SHORT_LIVED) flags |= FILE_ATTRIBUTE_TEMPORARY; if (oflag & _O_SEQUENTIAL) { flags |= FILE_FLAG_SEQUENTIAL_SCAN; } else if (oflag & _O_RANDOM) { flags |= FILE_FLAG_RANDOM_ACCESS; }
// Open the Windows file handle wchar_t *wpath = mp_from_utf8(NULL, filename); HANDLE h = CreateFileW(wpath, access, share, NULL, disposition, flags, NULL); talloc_free(wpath); if (h == INVALID_HANDLE_VALUE) { set_errno_from_lasterror(); return -1; }
// Map the Windows file handle to a CRT file descriptor. Note: MSVCRT only // cares about the following oflags. oflag &= _O_APPEND | _O_RDONLY | _O_RDWR | _O_WRONLY; oflag |= _O_NOINHERIT; // We never create inheritable handles int fd = _open_osfhandle((intptr_t)h, oflag); if (fd < 0) { CloseHandle(h); return -1; }
return fd;}
int mp_creat(const char *filename, int mode){ return mp_open(filename, _O_CREAT | _O_WRONLY | _O_TRUNC, mode);}
int mp_rename(const char *oldpath, const char *newpath){ wchar_t *woldpath = mp_from_utf8(NULL, oldpath), *wnewpath = mp_from_utf8(NULL, newpath); BOOL ok = MoveFileExW(woldpath, wnewpath, MOVEFILE_REPLACE_EXISTING); talloc_free(woldpath); talloc_free(wnewpath); if (!ok) { set_errno_from_lasterror(); return -1; } return 0;}
FILE *mp_fopen(const char *filename, const char *mode){ if (!mode[0]) { errno = EINVAL; return NULL; }
int rwmode; int oflags = 0; switch (mode[0]) { case 'r': rwmode = _O_RDONLY; break; case 'w': rwmode = _O_WRONLY; oflags |= _O_CREAT | _O_TRUNC; break; case 'a': rwmode = _O_WRONLY; oflags |= _O_CREAT | _O_APPEND; break; default: errno = EINVAL; return NULL; }
// Parse extra mode flags for (const char *pos = mode + 1; *pos; pos++) { switch (*pos) { case '+': rwmode = _O_RDWR; break; case 'x': oflags |= _O_EXCL; break; // Ignore unknown flags (glibc does too) default: break; } }
// Open a CRT file descriptor int fd = mp_open(filename, rwmode | oflags); if (fd < 0) return NULL;
// Add 'b' to the mode so the CRT knows the file is opened in binary mode char bmode[] = { mode[0], 'b', rwmode == _O_RDWR ? '+' : '\0', '\0' }; FILE *fp = fdopen(fd, bmode); if (!fp) { close(fd); return NULL; }
return fp;}
// Windows' MAX_PATH/PATH_MAX/FILENAME_MAX is fixed to 260, but this limit// applies to unicode paths encoded with wchar_t (2 bytes on Windows). The UTF-8// version could end up bigger in memory. In the worst case each wchar_t is// encoded to 3 bytes in UTF-8, so in the worst case we have:// wcslen(wpath) * 3 <= strlen(utf8path)// Thus we need MP_PATH_MAX as the UTF-8/char version of PATH_MAX.// Also make sure there's free space for the terminating \0.// (For codepoints encoded as UTF-16 surrogate pairs, UTF-8 has the same length.)// Lastly, note that neither _wdirent nor WIN32_FIND_DATA can store filenames// longer than this, so long-path support for readdir() is impossible.#define MP_FILENAME_MAX (FILENAME_MAX * 3 + 1)
struct mp_dir { DIR crap; // must be first member _WDIR *wdir; union { struct dirent dirent; // dirent has space only for FILENAME_MAX bytes. _wdirent has space for // FILENAME_MAX wchar_t, which might end up bigger as UTF-8 in some // cases. Guarantee we can always hold _wdirent.d_name converted to // UTF-8 (see above). // This works because dirent.d_name is the last member of dirent. char space[MP_FILENAME_MAX]; };};
DIR* mp_opendir(const char *path){ wchar_t *wpath = mp_from_utf8(NULL, path); _WDIR *wdir = _wopendir(wpath); talloc_free(wpath); if (!wdir) return NULL; struct mp_dir *mpdir = talloc(NULL, struct mp_dir); // DIR is supposed to be opaque, but unfortunately the MinGW headers still // define it. Make sure nobody tries to use it. memset(&mpdir->crap, 0xCD, sizeof(mpdir->crap)); mpdir->wdir = wdir; return (DIR*)mpdir;}
struct dirent* mp_readdir(DIR *dir){ struct mp_dir *mpdir = (struct mp_dir*)dir; struct _wdirent *wdirent = _wreaddir(mpdir->wdir); if (!wdirent) return NULL; size_t buffersize = sizeof(mpdir->space) - offsetof(struct dirent, d_name); WideCharToMultiByte(CP_UTF8, 0, wdirent->d_name, -1, mpdir->dirent.d_name, buffersize, NULL, NULL); mpdir->dirent.d_ino = 0; mpdir->dirent.d_reclen = 0; mpdir->dirent.d_namlen = strlen(mpdir->dirent.d_name); return &mpdir->dirent;}
int mp_closedir(DIR *dir){ struct mp_dir *mpdir = (struct mp_dir*)dir; int res = _wclosedir(mpdir->wdir); talloc_free(mpdir); return res;}
int mp_mkdir(const char *path, int mode){ wchar_t *wpath = mp_from_utf8(NULL, path); int res = _wmkdir(wpath); talloc_free(wpath); return res;}
int mp_unlink(const char *path){ wchar_t *wpath = mp_from_utf8(NULL, path); int res = _wunlink(wpath); talloc_free(wpath); return res;}
char *mp_win32_getcwd(char *buf, size_t size){ if (size >= SIZE_MAX / 3 - 1) { errno = ENOMEM; return NULL; } size_t wbuffer = size * 3 + 1; wchar_t *wres = talloc_array(NULL, wchar_t, wbuffer); DWORD wlen = GetFullPathNameW(L".", wbuffer, wres, NULL); if (wlen >= wbuffer || wlen == 0) { talloc_free(wres); errno = wlen ? ERANGE : ENOENT; return NULL; } char *t = mp_to_utf8(NULL, wres); talloc_free(wres); size_t st = strlen(t); if (st >= size) { talloc_free(t); errno = ERANGE; return NULL; } memcpy(buf, t, st + 1); talloc_free(t); return buf;}
static char **utf8_environ;static void *utf8_environ_ctx;
static void free_env(void){ talloc_free(utf8_environ_ctx); utf8_environ_ctx = NULL; utf8_environ = NULL;}
// Note: UNIX getenv() returns static strings, and we try to do the same. Since// using putenv() is not multithreading safe, we don't expect env vars to change// at runtime, and converting/allocating them in advance is ok.static void init_getenv(void){#if !HAVE_UWP wchar_t *wenv_begin = GetEnvironmentStringsW(); if (!wenv_begin) return; utf8_environ_ctx = talloc_new(NULL); int num_env = 0; wchar_t *wenv = wenv_begin; while (1) { size_t len = wcslen(wenv); if (!len) break; char *s = mp_to_utf8(utf8_environ_ctx, wenv); MP_TARRAY_APPEND(utf8_environ_ctx, utf8_environ, num_env, s); wenv += len + 1; } FreeEnvironmentStringsW(wenv_begin); MP_TARRAY_APPEND(utf8_environ_ctx, utf8_environ, num_env, NULL); // Avoid showing up in leak detectors etc. atexit(free_env);#endif}
char *mp_getenv(const char *name){ static mp_once once_init_getenv = MP_STATIC_ONCE_INITIALIZER; mp_exec_once(&once_init_getenv, init_getenv); // Copied from musl, http://git.musl-libc.org/cgit/musl/tree/COPYRIGHT // Copyright © 2005-2013 Rich Felker, standard MIT license int i; size_t l = strlen(name); if (!utf8_environ || !*name || strchr(name, '=')) return NULL; for (i=0; utf8_environ[i] && (strncmp(name, utf8_environ[i], l) || utf8_environ[i][l] != '='); i++) {} if (utf8_environ[i]) return utf8_environ[i] + l+1; return NULL;}
char ***mp_penviron(void){ mp_getenv(""); // ensure init return &utf8_environ; // `environ' should be an l-value}
off_t mp_lseek64(int fd, off_t offset, int whence){ HANDLE h = (HANDLE)_get_osfhandle(fd); if (h != INVALID_HANDLE_VALUE && GetFileType(h) != FILE_TYPE_DISK) { errno = ESPIPE; return (off_t)-1; } return _lseeki64(fd, offset, whence);}
int mp_ftruncate64(int fd, off_t length){ if (_chsize_s(fd, length) == 0) return 0; return -1;}
_Thread_localstatic struct { DWORD errcode; char *errstring;} mp_dl_result = { .errcode = 0, .errstring = NULL};
static void mp_dl_free(void){ talloc_free(mp_dl_result.errstring);}
static void mp_dl_init(void){ atexit(mp_dl_free);}
void *mp_dlopen(const char *filename, int flag){ HMODULE lib = NULL; void *ta_ctx = talloc_new(NULL); wchar_t *wfilename = mp_from_utf8(ta_ctx, filename);
DWORD len = GetFullPathNameW(wfilename, 0, NULL, NULL); if (!len) goto err;
wchar_t *path = talloc_array(ta_ctx, wchar_t, len); len = GetFullPathNameW(wfilename, len, path, NULL); if (!len) goto err;
lib = LoadLibraryW(path);
err: talloc_free(ta_ctx); mp_dl_result.errcode = GetLastError(); return (void *)lib;}
void *mp_dlsym(void *handle, const char *symbol){ FARPROC addr = GetProcAddress((HMODULE)handle, symbol); mp_dl_result.errcode = GetLastError(); return (void *)addr;}
char *mp_dlerror(void){ static mp_once once_init_dlerror = MP_STATIC_ONCE_INITIALIZER; mp_exec_once(&once_init_dlerror, mp_dl_init); mp_dl_free();
if (mp_dl_result.errcode == 0) return NULL;
mp_dl_result.errstring = talloc_strdup(NULL, mp_HRESULT_to_str(mp_dl_result.errcode)); mp_dl_result.errcode = 0;
return mp_dl_result.errstring == NULL ? "unknown error" : mp_dl_result.errstring;}
#if HAVE_UWPvoid *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset){ errno = ENOSYS; return MAP_FAILED;}
int munmap(void *addr, size_t length){ errno = ENOSYS; return -1;}
int msync(void *addr, size_t length, int flags){ errno = ENOSYS; return -1;}#else// Limited mmap() wrapper, inspired by:// http://code.google.com/p/mman-win32/source/browse/trunk/mman.c
void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset){ assert(addr == NULL); // not implemented assert(flags == MAP_SHARED); // not implemented
HANDLE osf = (HANDLE)_get_osfhandle(fd); if (!osf) { errno = EBADF; return MAP_FAILED; }
DWORD protect = 0; DWORD access = 0; if (prot & PROT_WRITE) { protect = PAGE_READWRITE; access = FILE_MAP_WRITE; } else if (prot & PROT_READ) { protect = PAGE_READONLY; access = FILE_MAP_READ; }
DWORD l_low = (uint32_t)length; DWORD l_high = ((uint64_t)length) >> 32; HANDLE map = CreateFileMapping(osf, NULL, protect, l_high, l_low, NULL);
if (!map) { errno = EACCES; // something random return MAP_FAILED; }
DWORD o_low = (uint32_t)offset; DWORD o_high = ((uint64_t)offset) >> 32; void *p = MapViewOfFile(map, access, o_high, o_low, length);
CloseHandle(map);
if (!p) { errno = EINVAL; return MAP_FAILED; } return p;}
int munmap(void *addr, size_t length){ UnmapViewOfFile(addr); return 0;}
int msync(void *addr, size_t length, int flags){ FlushViewOfFile(addr, length); return 0;}#endif
locale_t newlocale(int category, const char *locale, locale_t base){ return (locale_t)1;}
locale_t uselocale(locale_t locobj){ return (locale_t)1;}
void freelocale(locale_t locobj){}
#define MP_PIPE_BUF_SIZE 65536
int mp_make_cloexec_pipe(int pipes[2]){ if (_pipe(pipes, MP_PIPE_BUF_SIZE, _O_BINARY | _O_NOINHERIT) != 0) { pipes[0] = pipes[1] = -1; return -1; } return 0;}
int mp_make_wakeup_pipe(int pipes[2]){ static atomic_ulong pipe_id = 0;
pipes[0] = pipes[1] = -1; HANDLE handles[2]; handles[0] = handles[1] = INVALID_HANDLE_VALUE;
const char *pipe_name = mp_tprintf(55, "\\\\?\\pipe\\mpv\\%lu-%lu", mp_getpid(), atomic_fetch_add_explicit(&pipe_id, 1, memory_order_relaxed));
handles[1] = CreateNamedPipeA( pipe_name, PIPE_ACCESS_OUTBOUND | FILE_FLAG_FIRST_PIPE_INSTANCE | FILE_FLAG_OVERLAPPED, 0, 1, MP_PIPE_BUF_SIZE, MP_PIPE_BUF_SIZE, 0, NULL ); if (handles[1] == INVALID_HANDLE_VALUE) { set_errno_from_lasterror(); goto error; }
handles[0] = CreateFileA( pipe_name, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL ); if (handles[0] == INVALID_HANDLE_VALUE) { set_errno_from_lasterror(); goto error; }
if (!ConnectNamedPipe(handles[1], NULL) && GetLastError() != ERROR_PIPE_CONNECTED) { set_errno_from_lasterror(); goto error; }
for (int i = 0; i < 2; i++) { pipes[i] = _open_osfhandle((intptr_t)handles[i], 0); if (pipes[i] == -1) goto error; }
return 0;
error: for (int i = 0; i < 2; i++) { if (pipes[i] != -1) { _close(pipes[i]); pipes[i] = -1; } else if (handles[i] != INVALID_HANDLE_VALUE) { CloseHandle(handles[i]); } }
return -1;}
void mp_flush_wakeup_pipe(int pipe_end){ char buf[100]; OVERLAPPED operation = {}; HANDLE handle = (HANDLE)_get_osfhandle(pipe_end); if (handle == INVALID_HANDLE_VALUE) return; if (!ReadFile(handle, buf, sizeof(buf), NULL, &operation)) { if (GetLastError() != ERROR_IO_PENDING || !CancelIoEx(handle, &operation)) set_errno_from_lasterror(); }}
#endif // __MINGW32__