1 files changed, 125 insertions, 0 deletions
diff --git a/lib/libc_r/uthread/uthread_file.c b/lib/libc_r/uthread/uthread_file.c
new file mode 100644
index 0000000..0d8e9a3
--- /dev/null
+++ b/lib/libc_r/uthread/uthread_file.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by John Birrell.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+#include <signal.h>
+#include <stdio.h>
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+
+void
+_thread_flockfile(FILE * fp, char *fname, int lineno)
+{
+	int             fd, flags;
+	int             status;
+
+	/* Block signals: */
+	_thread_kern_sig_block(&status);
+
+	if ((fd = fileno(fp)) >= 0) {
+		if (fp->_flags & __SRW) {
+			flags = FD_READ | FD_WRITE;
+		} else {
+			if (fp->_flags & __SWR) {
+				flags = FD_WRITE;
+			} else {
+				flags = FD_READ;
+			}
+		}
+
+		/* This might fail but POSIX doesn't give a damn. */
+		_thread_fd_lock(fd, flags, NULL, fname, lineno);
+	}
+	/* Unblock signals: */
+	_thread_kern_sig_unblock(status);
+	return;
+}
+
+int
+_thread_ftrylockfile(FILE * fp)
+{
+	int             fd = 0;
+	int             flags;
+	int             status;
+
+	if ((fd = fileno(fp)) >= 0) {
+		/* Block signals: */
+		_thread_kern_sig_block(&status);
+
+		if (fp->_flags & __SRW) {
+			flags = FD_READ | FD_WRITE;
+		} else {
+			if (fp->_flags & __SWR) {
+				flags = FD_WRITE;
+			} else {
+				flags = FD_READ;
+			}
+		}
+		if (!(_thread_fd_table[fd]->r_owner && _thread_fd_table[fd]->w_owner)) {
+			_thread_fd_lock(fd, flags, NULL, __FILE__, __LINE__);
+			fd = 0;
+		} else {
+			fd = -1;
+		}
+
+		/* Unblock signals: */
+		_thread_kern_sig_unblock(status);
+	}
+	return (fd);
+}
+
+void 
+_thread_funlockfile(FILE * fp)
+{
+	int             fd, flags;
+	int             status;
+
+	if ((fd = fileno(fp)) >= 0) {
+		/* Block signals: */
+		_thread_kern_sig_block(&status);
+
+		if (fp->_flags & __SRW) {
+			flags = FD_READ | FD_WRITE;
+		} else if (fp->_flags & __SWR) {
+			flags = FD_WRITE;
+		} else {
+			flags = FD_READ;
+		}
+		_thread_fd_unlock(fd, flags);
+
+		/* Unblock signals: */
+		_thread_kern_sig_unblock(status);
+	}
+	return;
+}
+
+#endif