combined pchw and embedded into tiny. added section on arm to README

R=rsc
CC=golang-dev
http://codereview.appspot.com/194151

Committer: Russ Cox <rsc@golang.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/pkg/runtime/tiny/thread.c b/src/pkg/runtime/tiny/thread.c
new file mode 100644
index 000000000..e3e8a34b6
--- /dev/null
+++ b/src/pkg/runtime/tiny/thread.c
@@ -0,0 +1,80 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "runtime.h"
+
+int8 *goos = "tiny";
+
+void
+minit(void)
+{
+}
+
+void
+osinit(void)
+{
+}
+
+void
+initsig(void)
+{
+}
+
+void
+exit(int32)
+{
+	for(;;);
+}
+
+// single processor, no interrupts,
+// so no need for real concurrency or atomicity
+
+void
+newosproc(M *m, G *g, void *stk, void (*fn)(void))
+{
+	USED(m, g, stk, fn);
+	throw("newosproc");
+}
+
+void
+lock(Lock *l)
+{
+	if(m->locks < 0)
+		throw("lock count");
+	m->locks++;
+	if(l->key != 0)
+		throw("deadlock");
+	l->key = 1;
+}
+
+void
+unlock(Lock *l)
+{
+	m->locks--;
+	if(m->locks < 0)
+		throw("lock count");
+	if(l->key != 1)
+		throw("unlock of unlocked lock");
+	l->key = 0;
+}
+
+void
+noteclear(Note *n)
+{
+	n->lock.key = 0;
+}
+
+void
+notewakeup(Note *n)
+{
+	n->lock.key = 1;
+}
+
+void
+notesleep(Note *n)
+{
+	if(n->lock.key != 1)
+		throw("notesleep");
+}
+