Reviewed by: julian

Submitted by:	 john birrel

One version of the pthreads library
another will follow with differnt actions under some cases..
not QUITE complete

1 files changed, 74 insertions, 0 deletions

diff --git a/lib/libpthread/thread/thr_readv.c b/lib/libpthread/thread/thr_readv.c
new file mode 100644
index 0000000..acb72ac
--- /dev/null
+++ b/lib/libpthread/thread/thr_readv.c
@@ -0,0 +1,74 @@
+/*
+ * 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 <sys/types.h>
+#include <sys/fcntl.h>
+#include <sys/uio.h>
+#include <errno.h>
+#include <unistd.h>
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+
+ssize_t
+readv(int fd, const struct iovec * iov, int iovcnt)
+{
+	int             nonblock;
+	int             ret;
+	int             status;
+	if (fd < 0 || fd > _thread_dtablesize || _thread_fd_table[fd] == NULL) {
+		_thread_seterrno(_thread_run, EBADF);
+		ret = -1;
+	} else if ((nonblock = _thread_fd_table[fd]->flags & O_NONBLOCK) == 0 && (ret = _thread_fd_lock(fd, FD_READ, NULL, __FILE__, __LINE__)) != 0) {
+		/* Cannot lock file descriptor. */
+	} else {
+		while ((ret = _thread_sys_readv(fd, iov, iovcnt)) < 0) {
+			if (nonblock == 0 && (errno == EWOULDBLOCK || errno == EAGAIN)) {
+				_thread_kern_sig_block(&status);
+				_thread_run->data.fd.fd = fd;
+				_thread_kern_set_timeout(NULL);
+				_thread_kern_sched_state(PS_FDR_WAIT, __FILE__, __LINE__);
+				if (errno == EINTR) {
+					ret = -1;
+					break;
+				}
+			} else {
+				break;
+			}
+		}
+		if (nonblock == 0) {
+			_thread_fd_unlock(fd, FD_READ);
+		}
+	}
+	return (ret);
+}
+#endif