replace ulong with usize for all the memory(2) functions.  this
gets us a step closer to allowing sizeof(usize)==8

Reference: /n/atom/patch/applied/memoryusize
Date: Sun Aug 16 05:54:38 CES 2015
Signed-off-by: quanstro@quanstro.net

--- /sys/src/fs/port/lib.h	Sun Aug 16 05:53:23 2015
+++ /sys/src/fs/port/lib.h	Sun Aug 16 05:53:24 2015
@@ -2,16 +2,16 @@
  * functions (possibly) linked in, complete, from libc.
  */
 #define	nelem(x)	(sizeof(x)/sizeof((x)[0]))
-#define offsetof(s, m)	(ulong)(&(((s*)0)->m))
+#define offsetof(s, m)	(usize)(&(((s*)0)->m))
 #define assert(x)	if(x){}else _assert("x")
 
 /*
  * mem routines
  */
-extern	void*	memset(void*, int, ulong);
-extern	int	memcmp(void*, void*, ulong);
-extern	void*	memmove(void*, void*, ulong);
-extern	void*	memchr(void*, int, ulong);
+extern	void*	memset(void*, int, usize);
+extern	int	memcmp(void*, void*, usize);
+extern	void*	memmove(void*, void*, usize);
+extern	void*	memchr(void*, int, usize);
 
 /*
  * string routines
--- /sys/src/libc/port/memccpy.c	Sun Aug 16 05:53:26 2015
+++ /sys/src/libc/port/memccpy.c	Sun Aug 16 05:53:27 2015
@@ -2,7 +2,7 @@
 #include	<libc.h>
 
 void*
-memccpy(void *a1, void *a2, int c, ulong n)
+memccpy(void *a1, void *a2, int c, usize n)
 {
 	uchar *s1, *s2;
 
--- /sys/src/libc/port/memchr.c	Sun Aug 16 05:53:29 2015
+++ /sys/src/libc/port/memchr.c	Sun Aug 16 05:53:30 2015
@@ -2,7 +2,7 @@
 #include	<libc.h>
 
 void*
-memchr(void *ap, int c, ulong n)
+memchr(void *ap, int c, usize n)
 {
 	uchar *sp;
 
--- /sys/src/libc/port/memcmp.c	Sun Aug 16 05:53:32 2015
+++ /sys/src/libc/port/memcmp.c	Sun Aug 16 05:53:33 2015
@@ -2,7 +2,7 @@
 #include	<libc.h>
 
 int
-memcmp(void *a1, void *a2, ulong n)
+memcmp(void *a1, void *a2, usize n)
 {
 	uchar *s1, *s2;
 	uint c1, c2;
--- /sys/src/libc/port/memmove.c	Sun Aug 16 05:53:35 2015
+++ /sys/src/libc/port/memmove.c	Sun Aug 16 05:53:36 2015
@@ -2,7 +2,7 @@
 #include	<libc.h>
 
 void*
-memmove(void *a1, void *a2, ulong n)
+memmove(void *a1, void *a2, usize n)
 {
 	char *s1, *s2;
 
@@ -29,7 +29,7 @@
 }
 
 void*
-memcpy(void *a1, void *a2, ulong n)
+memcpy(void *a1, void *a2, usize n)
 {
 	return memmove(a1, a2, n);
 }
--- /sys/src/libc/port/memset.c	Sun Aug 16 05:53:38 2015
+++ /sys/src/libc/port/memset.c	Sun Aug 16 05:53:39 2015
@@ -2,7 +2,7 @@
 #include	<libc.h>
 
 void*
-memset(void *ap, int c, ulong n)
+memset(void *ap, int c, usize n)
 {
 	char *p;
 
--- /sys/src/nix/port/lib.h	Sun Aug 16 05:53:42 2015
+++ /sys/src/nix/port/lib.h	Sun Aug 16 05:53:43 2015
@@ -2,17 +2,17 @@
  * functions (possibly) linked in, complete, from libc.
  */
 #define nelem(x)	(sizeof(x)/sizeof((x)[0]))
-#define offsetof(s, m)	(ulong)(&(((s*)0)->m))
+#define offsetof(s, m)	(usize)(&(((s*)0)->m))
 #define assert(x)	if(x){}else _assert("x")
 
 /*
  * mem routines
  */
-extern	void*	memccpy(void*, void*, int, ulong);
-extern	void*	memset(void*, int, ulong);
-extern	int	memcmp(void*, void*, ulong);
-extern	void*	memmove(void*, void*, ulong);
-extern	void*	memchr(void*, int, ulong);
+extern	void*	memccpy(void*, void*, int, usize);
+extern	void*	memset(void*, int, usize);
+extern	int	memcmp(void*, void*, usize);
+extern	void*	memmove(void*, void*, usize);
+extern	void*	memchr(void*, int, usize);
 
 /*
  * string routines
@@ -60,8 +60,8 @@
 extern	void	free(void*);
 extern	usize	msize(void*);
 extern	void*	mallocalign(usize, usize, long, usize);
-extern	void	setmalloctag(void*, uintptr);			/* compatability with /sys/include/libc.h */
-extern	void	setrealloctag(void*, uintptr);			/* compatability with /sys/include/libc.h */
+extern	void	setmalloctag(void*, uintptr);		/* compatability with /sys/include/libc.h */
+extern	void	setrealloctag(void*, uintptr);		/* compatability with /sys/include/libc.h */
 extern	uintptr	getmalloctag(void*);
 extern	uintptr	getrealloctag(void*);
 extern	void*	realloc(void*, usize);
--- /sys/include/libc.h	Sun Aug 16 05:53:46 2015
+++ /sys/include/libc.h	Sun Aug 16 05:53:47 2015
@@ -2,18 +2,18 @@
 #pragma	src	"/sys/src/libc"
 
 #define	nelem(x)	(sizeof(x)/sizeof((x)[0]))
-#define	offsetof(s, m)	(ulong)(&(((s*)0)->m))
+#define	offsetof(s, m)	(usize)(&(((s*)0)->m))
 #define	assert(x)	if(x){}else _assert("x")
 
 /*
  * mem routines
  */
-extern	void*	memccpy(void*, void*, int, ulong);
-extern	void*	memset(void*, int, ulong);
-extern	int	memcmp(void*, void*, ulong);
-extern	void*	memcpy(void*, void*, ulong);
-extern	void*	memmove(void*, void*, ulong);
-extern	void*	memchr(void*, int, ulong);
+extern	void*	memccpy(void*, void*, int, usize);
+extern	void*	memset(void*, int, usize);
+extern	int	memcmp(void*, void*, usize);
+extern	void*	memcpy(void*, void*, usize);
+extern	void*	memmove(void*, void*, usize);
+extern	void*	memchr(void*, int, usize);
 
 /*
  * string routines
@@ -99,17 +99,17 @@
 /*
  * malloc
  */
-extern	void*	malloc(ulong);
-extern	void*	mallocz(ulong, int);
+extern	void*	malloc(usize);
+extern	void*	mallocz(usize, int);
 extern	void	free(void*);
-extern	ulong	msize(void*);
-extern	void*	mallocalign(ulong, ulong, long, ulong);
-extern	void*	calloc(ulong, ulong);
-extern	void*	realloc(void*, ulong);
-extern	void	setmalloctag(void*, ulong);
-extern	void	setrealloctag(void*, ulong);
-extern	ulong	getmalloctag(void*);
-extern	ulong	getrealloctag(void*);
+extern	usize	msize(void*);
+extern	void*	mallocalign(usize, usize, long, usize);
+extern	void*	calloc(usize, usize);
+extern	void*	realloc(void*, usize);
+extern	void	setmalloctag(void*, uintptr);
+extern	void	setrealloctag(void*, uintptr);
+extern	uintptr	getmalloctag(void*);
+extern	uintptr	getrealloctag(void*);
 extern	void*	malloctopoolblock(void*);
 
 /*
--- /sys/man/2/memory	Sun Aug 16 05:53:49 2015
+++ /sys/man/2/memory	Sun Aug 16 05:53:50 2015
@@ -8,22 +8,22 @@
 .PP
 .ta \w'\fLvoid* 'u
 .B
-void*	memccpy(void *s1, void *s2, int c, ulong n)
+void*	memccpy(void *s1, void *s2, int c, usize n)
 .PP
 .B
-void*	memchr(void *s, int c, ulong n)
+void*	memchr(void *s, int c, usize n)
 .PP
 .B
-int	memcmp(void *s1, void *s2, ulong n)
+int	memcmp(void *s1, void *s2, usize n)
 .PP
 .B
-void*	memcpy(void *s1, void *s2, ulong n)
+void*	memcpy(void *s1, void *s2, usize n)
 .PP
 .B
-void*	memmove(void *s1, void *s2, ulong n)
+void*	memmove(void *s1, void *s2, usize n)
 .PP
 .B
-void*	memset(void *s, int c, ulong n)
+void*	memset(void *s, int c, usize n)
 .SH DESCRIPTION
 These functions operate efficiently on memory areas
 (arrays of bytes bounded by a count, not terminated by a zero byte).