X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Futil.h;h=0db41be926389f0d48e9cb4af868e774b853f3bd;hb=77d14d9c7f9ce7245eff56aacd420646577892d0;hp=4f6a20165e67a0953d2685afc38f486518e3dfae;hpb=4816a18f33380a33d381b77d41df39113c94500d;p=sliver-openvswitch.git

diff --git a/lib/util.h b/lib/util.h
index 4f6a20165..0db41be92 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,8 +23,10 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "compiler.h"
+#include "openvswitch/types.h"
 
 #ifndef va_copy
 #ifdef __va_copy
@@ -84,7 +86,6 @@ void ovs_assert_failure(const char *, const char *, const char *) NO_RETURN;
      (TYPE) (POINTER))
 
 extern const char *program_name;
-extern const char *subprogram_name;
 
 /* Returns the number of elements in ARRAY. */
 #define ARRAY_SIZE(ARRAY) (sizeof ARRAY / sizeof *ARRAY)
@@ -107,6 +108,25 @@ is_pow2(uintmax_t x)
     return IS_POW2(x);
 }
 
+/* Returns X rounded up to a power of 2.  X must be a constant expression. */
+#define ROUND_UP_POW2(X) RUP2__(X)
+#define RUP2__(X) (RUP2_1(X) + 1)
+#define RUP2_1(X) (RUP2_2(X) | (RUP2_2(X) >> 16))
+#define RUP2_2(X) (RUP2_3(X) | (RUP2_3(X) >> 8))
+#define RUP2_3(X) (RUP2_4(X) | (RUP2_4(X) >> 4))
+#define RUP2_4(X) (RUP2_5(X) | (RUP2_5(X) >> 2))
+#define RUP2_5(X) (RUP2_6(X) | (RUP2_6(X) >> 1))
+#define RUP2_6(X) ((X) - 1)
+
+/* Returns X rounded down to a power of 2.  X must be a constant expression. */
+#define ROUND_DOWN_POW2(X) RDP2__(X)
+#define RDP2__(X) (RDP2_1(X) - (RDP2_1(X) >> 1))
+#define RDP2_1(X) (RDP2_2(X) | (RDP2_2(X) >> 16))
+#define RDP2_2(X) (RDP2_3(X) | (RDP2_3(X) >> 8))
+#define RDP2_3(X) (RDP2_4(X) | (RDP2_4(X) >> 4))
+#define RDP2_4(X) (RDP2_5(X) | (RDP2_5(X) >> 2))
+#define RDP2_5(X) (      (X) | (      (X) >> 1))
+
 #ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
 #endif
@@ -169,9 +189,13 @@ is_pow2(uintmax_t x)
  * that that OBJECT points to, assigns the address of the outer object to
  * OBJECT, which must be an lvalue.
  *
- * Evaluates to 1. */
+ * Evaluates to (void) 0 as the result is not to be used. */
 #define ASSIGN_CONTAINER(OBJECT, POINTER, MEMBER) \
-    ((OBJECT) = OBJECT_CONTAINING(POINTER, OBJECT, MEMBER), 1)
+    ((OBJECT) = OBJECT_CONTAINING(POINTER, OBJECT, MEMBER), (void) 0)
+
+/* Given ATTR, and TYPE, cast the ATTR to TYPE by first casting ATTR to
+ * (void *). This is to suppress the alignment warning issued by clang. */
+#define ALIGNED_CAST(TYPE, ATTR) ((TYPE) (void *) (ATTR))
 
 #ifdef  __cplusplus
 extern "C" {
@@ -182,6 +206,9 @@ void set_program_name__(const char *name, const char *version,
 #define set_program_name(name) \
         set_program_name__(name, VERSION, __DATE__, __TIME__)
 
+const char *get_subprogram_name(void);
+void set_subprogram_name(const char *name);
+
 const char *get_program_version(void);
 void ovs_print_version(uint8_t min_ofp, uint8_t max_ofp);
 
@@ -212,6 +239,7 @@ void ovs_error(int err_no, const char *format, ...) PRINTF_FORMAT(2, 3);
 void ovs_error_valist(int err_no, const char *format, va_list)
     PRINTF_FORMAT(2, 0);
 const char *ovs_retval_to_string(int);
+const char *ovs_strerror(int);
 void ovs_hex_dump(FILE *, const void *, size_t, uintptr_t offset, bool ascii);
 
 bool str_to_int(const char *, int base, int *);