コード例 #1
0
ファイル: hepevt.go プロジェクト: sbinet/go-hepevt
// write particle information
func PrintParticle(idx int, f *os.File) {
	if f == nil {
		f = os.Stdout
	}
	c_fd := C.int(f.Fd())
	_ = f.Sync()
	c_mode := C.CString("a")
	defer C.free(unsafe.Pointer(c_mode))
	c_f := C.fdopen(c_fd, c_mode)
	C.fflush(c_f)
	C.hepevt_print_particle(C.int(idx+1), c_f)
	C.fflush(c_f)
	_ = f.Sync()
}
コード例 #2
0
func (s *Serializer) end() {
	C.raptor_serializer_serialize_end(s.serializer)
	if s.fh != nil {
		C.fflush(s.fh)
	}
	s.running = false
}
コード例 #3
0
ファイル: linuxstats.go プロジェクト: bogdanbatog/cockroach
func logLinuxStats() {
	if !log.V(1) {
		return
	}

	// We don't know which fields in struct mallinfo are most relevant to us yet,
	// so log it all for now.
	//
	// A major caveat is that mallinfo() returns stats only for the main arena.
	// glibc uses multiple allocation arenas to increase malloc performance for
	// multithreaded processes, so mallinfo may not report on significant parts
	// of the heap.
	mi := C.mallinfo()
	log.Infof("mallinfo stats: ordblks=%s, smblks=%s, hblks=%s, hblkhd=%s, usmblks=%s, fsmblks=%s, "+
		"uordblks=%s, fordblks=%s, keepcost=%s",
		humanize.IBytes(uint64(mi.ordblks)),
		humanize.IBytes(uint64(mi.smblks)),
		humanize.IBytes(uint64(mi.hblks)),
		humanize.IBytes(uint64(mi.hblkhd)),
		humanize.IBytes(uint64(mi.usmblks)),
		humanize.IBytes(uint64(mi.fsmblks)),
		humanize.IBytes(uint64(mi.uordblks)),
		humanize.IBytes(uint64(mi.fordblks)),
		humanize.IBytes(uint64(mi.fsmblks)))

	// malloc_info() emits a *lot* of XML, partly because it generates stats for
	// all arenas, unlike mallinfo().
	//
	// TODO(cdo): extract the useful bits and record to time-series DB.
	if !log.V(2) {
		return
	}

	// Create a memstream and make malloc_info() output to it.
	var buf *C.char
	var bufSize C.size_t
	memstream := C.open_memstream(&buf, &bufSize)
	if memstream == nil {
		log.Warning("couldn't open memstream")
		return
	}
	defer func() {
		C.fclose(memstream)
		C.free(unsafe.Pointer(buf))
	}()
	if rc := C.malloc_info(0, memstream); rc != 0 {
		log.Warningf("malloc_info returned %d", rc)
		return
	}
	if rc := C.fflush(memstream); rc != 0 {
		log.Warningf("fflush returned %d", rc)
		return
	}
	log.Infof("malloc_info: %s", C.GoString(buf))
}
コード例 #4
0
ファイル: hepevt.go プロジェクト: sbinet/go-hepevt
// check for problems with HEPEVT common block
func CheckHepevtConsistency(f *os.File) bool {

	if f == nil {
		f = os.Stdout
	}
	c_fd := C.int(f.Fd())
	_ = f.Sync()
	c_mode := C.CString("a")
	defer C.free(unsafe.Pointer(c_mode))
	c_f := C.fdopen(c_fd, c_mode)
	C.fflush(c_f)

	o := C.hepevt_check_hepevt_consistency(c_f)
	C.fflush(c_f)
	_ = f.Sync()

	if o != C.int(0) {
		return true
	}
	return false
}
コード例 #5
0
ファイル: pigosat.go プロジェクト: justinfx/pigosat
// cFileWriterWrapper copies writeFn's data into w. writeFn takes a *C.FILE, and
// whatever writeFn writes to that *C.FILE, cFileWriterWrapper will then
// copy to w. This wrapper allows the Go API to write to io.Writers anything
// PicoSAT writes to a *C.FILE. writeFn need not close the *C.FILE.
func cFileWriterWrapper(w io.Writer, writeFn func(*C.FILE) error) (err error) {
	rp, wp, err := os.Pipe()
	if err != nil {
		return err
	}
	// To avoid double closing wp, close it explicitly at each error branch.
	// Closing rp here is a data race with the io.Copy(w, rp) call in the
	// goroutine below, but only if there is an error that causes the the outer
	// function to return early. But then io.Copy will just return an error,
	// which we (reasonably) ignore.
	defer func() {
		if e := rp.Close(); e != nil { // Don't hide prior errors.
			err = e
		}
	}()

	cfile, err := cfdopen(wp, "a") // wp.Close() below closes cfile.
	if err != nil {
		wp.Close()
		return err
	}

	// We have to read from the pipe in a separate goroutine because the write
	// end of the pipe will block if the pipe gets full.
	errChan := make(chan error, 1)
	go func() {
		_, e := io.Copy(w, rp)
		errChan <- e
	}()

	if err = writeFn(cfile); err != nil {
		wp.Close()
		return err
	}

	// We have to close wp or rp won't know it's hit the end of the data.
	// Without flushing cfile, the data might get stuck in the C buffer.
	if ok, err := C.fflush(cfile); ok != 0 {
		wp.Close()
		return err
	}
	if err = wp.Close(); err != nil {
		return err
	}
	return <-errChan
}
コード例 #6
0
ファイル: file.go プロジェクト: WXB506/golang
func (f *File) Flush() {
	C.fflush((*C.FILE)(f))
}