libbb: add forgotten file from previous commit :(

[oweals/busybox.git] / include / platform.h

diff --git a/include/platform.h b/include/platform.h
index 0e0ccaf90c69bc0547b59086fcb7ea8026c2f2da..b31108267b3e4043be77900561a6c66d5d876484 100644 (file)
--- a/include/platform.h
+++ b/include/platform.h
@@ -1,6 +1,6 @@
 /* vi: set sw=4 ts=4: */
 /*
-   Copyright 2006, Bernhard Fischer
+   Copyright 2006, Bernhard Reutner-Fischer
 
    Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 */
@@ -48,27 +48,27 @@
 # define __const const
 #endif
 
-#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
-#define ATTRIBUTE_PACKED __attribute__ ((__packed__))
-#define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m)))
+#define UNUSED_PARAM __attribute__ ((__unused__))
+#define NORETURN __attribute__ ((__noreturn__))
+#define PACKED __attribute__ ((__packed__))
+#define ALIGNED(m) __attribute__ ((__aligned__(m)))
 /* __NO_INLINE__: some gcc's do not honor inlining! :( */
 #if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__)
 # define ALWAYS_INLINE __attribute__ ((always_inline)) inline
 /* I've seen a toolchain where I needed __noinline__ instead of noinline */
 # define NOINLINE      __attribute__((__noinline__))
 # if !ENABLE_WERROR
-#  define ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
-#  define ATTRIBUTE_UNUSED_RESULT __attribute__ ((warn_unused_result))
+#  define DEPRECATED __attribute__ ((__deprecated__))
+#  define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result))
 # else
-#  define ATTRIBUTE_DEPRECATED /* n/a */
-#  define ATTRIBUTE_UNUSED_RESULT /* n/a */
+#  define DEPRECATED /* n/a */
+#  define UNUSED_PARAM_RESULT /* n/a */
 # endif
 #else
 # define ALWAYS_INLINE inline /* n/a */
 # define NOINLINE /* n/a */
-# define ATTRIBUTE_DEPRECATED /* n/a */
-# define ATTRIBUTE_UNUSED_RESULT /* n/a */
+# define DEPRECATED /* n/a */
+# define UNUSED_PARAM_RESULT /* n/a */
 #endif
 
 /* -fwhole-program makes all symbols local. The attribute externally_visible
@@ -97,6 +97,19 @@
 # endif
 #endif
 
+/* FAST_FUNC is a qualifier which (possibly) makes function call faster
+ * and/or smaller by using modified ABI. It is usually only needed
+ * on non-static, busybox internal functions. Recent versions of gcc
+ * optimize statics automatically. FAST_FUNC on static is required
+ * only if you need to match a function pointer's type */
+#if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */
+/* stdcall makes callee to pop arguments from stack, not caller */
+# define FAST_FUNC __attribute__((regparm(3),stdcall))
+/* #elif ... - add your favorite arch today! */
+#else
+# define FAST_FUNC
+#endif
+
 /* ---- Endian Detection ------------------------------------ */
 
 #if (defined __digital__ && defined __unix__)
@@ -135,7 +148,19 @@
 #define SWAP_LE64(x) (x)
 #endif
 
+/* ---- Unaligned access ------------------------------------ */
+
+/* parameter is supposed to be an uint32_t* ptr */
+#if defined(i386) || defined(__x86_64__)
+#define get_unaligned_u32p(u32p) (*(u32p))
+/* #elif ... - add your favorite arch today! */
+#else
+/* performs reasonably well (gcc usually inlines memcpy here) */
+#define get_unaligned_u32p(u32p) ({ uint32_t __t; memcpy(&__t, (u32p), 4); __t; })
+#endif
+
 /* ---- Networking ------------------------------------------ */
+
 #ifndef __APPLE__
 # include <arpa/inet.h>
 # ifndef __socklen_t_defined
@@ -146,6 +171,7 @@ typedef int socklen_t;
 #endif
 
 /* ---- Compiler dependent settings ------------------------- */
+
 #if (defined __digital__ && defined __unix__) || defined __APPLE__
 # undef HAVE_MNTENT_H
 # undef HAVE_SYS_STATFS_H
@@ -163,9 +189,10 @@ __extension__ typedef unsigned long long __u64;
 #endif
 
 /*----- Kernel versioning ------------------------------------*/
+
 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
 
-/* ---- miscellaneous --------------------------------------- */
+/* ---- Miscellaneous --------------------------------------- */
 
 #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
        !defined(__dietlibc__) && \
@@ -235,12 +262,10 @@ typedef unsigned smalluint;
     (defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
     __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__)
 #define BB_MMU 0
-#define BB_NOMMU 1
 #define USE_FOR_NOMMU(...) __VA_ARGS__
 #define USE_FOR_MMU(...)
 #else
 #define BB_MMU 1
-/* BB_NOMMU is not defined in this case! */
 #define USE_FOR_NOMMU(...)
 #define USE_FOR_MMU(...) __VA_ARGS__
 #endif
@@ -325,7 +350,9 @@ static ALWAYS_INLINE char* strchrnul(const char *s, char c)
 #ifndef MS_SHARED
 #define MS_SHARED      (1<<20)
 #endif
-
+#ifndef MS_RELATIME
+#define MS_RELATIME   (1 << 21)
+#endif
 
 #if !defined(BLKSSZGET)
 #define BLKSSZGET _IO(0x12, 104)