From 505c19580e0f43fe5224431459cacb7c21edd93d Mon Sep 17 00:00:00 2001
From: Ondřej Surý <ondrej@sury.org>
Date: Fri, 6 Apr 2012 15:14:11 +0200
Subject: Imported Upstream version 1

---
 src/pkg/runtime/mem_openbsd.c | 85 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/pkg/runtime/mem_openbsd.c

(limited to 'src/pkg/runtime/mem_openbsd.c')

diff --git a/src/pkg/runtime/mem_openbsd.c b/src/pkg/runtime/mem_openbsd.c
new file mode 100644
index 000000000..34ff31d90
--- /dev/null
+++ b/src/pkg/runtime/mem_openbsd.c
@@ -0,0 +1,85 @@
+// 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"
+#include "arch_GOARCH.h"
+#include "defs_GOOS_GOARCH.h"
+#include "os_GOOS.h"
+#include "malloc.h"
+
+enum
+{
+	ENOMEM = 12,
+};
+
+void*
+runtime·SysAlloc(uintptr n)
+{
+	void *v;
+
+	mstats.sys += n;
+	v = runtime·mmap(nil, n, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANON|MAP_PRIVATE, -1, 0);
+	if(v < (void*)4096)
+		return nil;
+	return v;
+}
+
+void
+runtime·SysUnused(void *v, uintptr n)
+{
+	USED(v);
+	USED(n);
+	// TODO(rsc): call madvise MADV_DONTNEED
+}
+
+void
+runtime·SysFree(void *v, uintptr n)
+{
+	mstats.sys -= n;
+	runtime·munmap(v, n);
+}
+
+void*
+runtime·SysReserve(void *v, uintptr n)
+{
+	void *p;
+
+	// On 64-bit, people with ulimit -v set complain if we reserve too
+	// much address space.  Instead, assume that the reservation is okay
+	// and check the assumption in SysMap.
+	if(sizeof(void*) == 8)
+		return v;
+
+	p = runtime·mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
+	if (p == ((void *)-ENOMEM))
+		return nil;
+	else
+		return p;
+}
+
+void
+runtime·SysMap(void *v, uintptr n)
+{
+	void *p;
+	
+	mstats.sys += n;
+
+	// On 64-bit, we don't actually have v reserved, so tread carefully.
+	if(sizeof(void*) == 8) {
+		p = runtime·mmap(v, n, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANON|MAP_PRIVATE, -1, 0);
+		if(p == (void*)-ENOMEM)
+			runtime·throw("runtime: out of memory");
+		if(p != v) {
+			runtime·printf("runtime: address space conflict: map(%p) = %p\n", v, p);
+			runtime·throw("runtime: address space conflict");
+		}
+		return;
+	}
+
+	p = runtime·mmap(v, n, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0);
+	if(p == (void*)-ENOMEM)
+		runtime·throw("runtime: out of memory");
+	if(p != v)
+		runtime·throw("runtime: cannot map pages in arena address space");
+}
-- 
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