808e91956d
When a platform feature isn't available or in use, we sometimes conditionally compile empty or trivial functions to turn these into noops. We need to annotate their parameters so that -Wunused-parameters won't complain about them. Note that there are many more of these in compat/mingw.h, but we'll leave them for now, as there's some trickery required to get the UNUSED macro available there. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
51 lines
939 B
C
51 lines
939 B
C
#include "git-compat-util.h"
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#include "nonblock.h"
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#ifdef O_NONBLOCK
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int enable_pipe_nonblock(int fd)
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{
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int flags = fcntl(fd, F_GETFL);
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if (flags < 0)
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return -1;
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flags |= O_NONBLOCK;
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return fcntl(fd, F_SETFL, flags);
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}
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#elif defined(GIT_WINDOWS_NATIVE)
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#include "win32.h"
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int enable_pipe_nonblock(int fd)
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{
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HANDLE h = (HANDLE)_get_osfhandle(fd);
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DWORD mode;
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DWORD type = GetFileType(h);
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if (type == FILE_TYPE_UNKNOWN && GetLastError() != NO_ERROR) {
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errno = EBADF;
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return -1;
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}
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if (type != FILE_TYPE_PIPE)
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BUG("unsupported file type: %lu", type);
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if (!GetNamedPipeHandleState(h, &mode, NULL, NULL, NULL, NULL, 0)) {
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errno = err_win_to_posix(GetLastError());
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return -1;
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}
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mode |= PIPE_NOWAIT;
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if (!SetNamedPipeHandleState(h, &mode, NULL, NULL)) {
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errno = err_win_to_posix(GetLastError());
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return -1;
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}
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return 0;
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}
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#else
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int enable_pipe_nonblock(int fd UNUSED)
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{
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errno = ENOSYS;
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return -1;
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}
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#endif
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