From 594175d0b5e1c183b0d1642dabbc85437f07407b Mon Sep 17 00:00:00 2001
From: Ken Thompson <ken@golang.org>
Date: Sun, 13 Jul 2008 14:29:46 -0700
Subject: chan

SVN=126958
---
 src/runtime/runtime.c | 147 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 145 insertions(+), 2 deletions(-)

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

diff --git a/src/runtime/runtime.c b/src/runtime/runtime.c
index f8dfa954cc..bc6c0ccb9d 100644
--- a/src/runtime/runtime.c
+++ b/src/runtime/runtime.c
@@ -64,6 +64,17 @@ mcpy(byte *t, byte *f, uint32 n)
 	}
 }
 
+uint32
+rnd(uint32 n, uint32 m)
+{
+	uint32 r;
+
+	r = n % m;
+	if(r)
+		n += m-r;
+	return n;
+}
+
 static byte*
 brk(uint32 n)
 {
@@ -81,7 +92,7 @@ mal(uint32 n)
 	byte* v;
 
 	// round to keep everything 64-bit aligned
-	n = (n+7) & ~7;
+	n = rnd(n, 8);
 	nmal += n;
 
 	// do we have enough in contiguous hunk
@@ -469,7 +480,6 @@ static uint8**	argv;
 static int32	envc;
 static uint8**	envv;
 
-
 void
 args(int32 c, uint8 **v)
 {
@@ -797,3 +807,136 @@ sys·morestack(uint64 u)
 
 	*(int32*)234 = 123;
 }
+
+/*
+ * map and chan helpers for
+ * dealing with unknown types
+ */
+
+static uint64
+memhash(uint32 s, void *a)
+{
+	prints("memhash\n");
+	return 0x12345;
+}
+
+static uint32
+memequal(uint32 s, void *a, void *b)
+{
+	byte *ba, *bb;
+	uint32 i;
+
+	ba = a;
+	bb = b;
+	for(i=0; i<s; i++)
+		if(ba[i] != bb[i])
+			return 0;
+	return 1;
+}
+
+static void
+memprint(uint32 s, void *a)
+{
+	uint64 v;
+
+	v = 0xbadb00b;
+	switch(s) {
+	case 1:
+		v = *(uint8*)a;
+		break;
+	case 2:
+		v = *(uint16*)a;
+		break;
+	case 4:
+		v = *(uint32*)a;
+		break;
+	case 8:
+		v = *(uint64*)a;
+		break;
+	}
+	sys·printint(v);
+}
+
+static void
+memcopy(uint32 s, void *a, void *b)
+{
+	byte *ba, *bb;
+	uint32 i;
+
+	ba = a;
+	bb = b;
+	if(bb == nil) {
+		for(i=0; i<s; i++)
+			ba[i] = 0;
+		return;
+	}
+	for(i=0; i<s; i++)
+		ba[i] = bb[i];
+}
+
+static uint64
+stringhash(uint32 s, string *a)
+{
+	prints("stringhash\n");
+	return 0x12345;
+}
+
+static uint32
+stringequal(uint32 s, string *a, string *b)
+{
+	return cmpstring(*a, *b) == 0;
+}
+
+static void
+stringprint(uint32 s, string *a)
+{
+	sys·printstring(*a);
+}
+
+static void
+stringcopy(uint32 s, string *a, string *b)
+{
+	if(b == nil) {
+		*a = nil;
+		return;
+	}
+	*a = *b;
+}
+
+static uint64
+pointerhash(uint32 s, void **a)
+{
+	prints("pointerhash\n");
+	return 0x12345;
+}
+
+static uint32
+pointerequal(uint32 s, void **a, void **b)
+{
+	prints("pointerequal\n");
+	return 0;
+}
+
+static void
+pointerprint(uint32 s, void **a)
+{
+	prints("pointerprint\n");
+}
+
+static void
+pointercopy(uint32 s, void **a, void **b)
+{
+	if(b == nil) {
+		*a = nil;
+		return;
+	}
+	*a = *b;
+}
+
+Alg
+algarray[3] =
+{
+	{	&memhash,	&memequal,	&memprint,	&memcopy	},
+	{	&stringhash,	&stringequal,	&stringprint,	&stringcopy	},
+	{	&pointerhash,	&pointerequal,	&pointerprint,	&pointercopy	},
+};
-- 
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