X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=ucw%2Flib.h;h=e7518defa3d64a30cbcdfe9b39e9a3cbfc1fa21a;hb=0204a4ff10292047628c754b0d088a742b511bb3;hp=19a9c7a834077293c43a287c1fe551e8f6335457;hpb=ba1c173f544383aa6553a75dee6e6858d8f243a4;p=libucw.git diff --git a/ucw/lib.h b/ucw/lib.h index 19a9c7a8..e7518def 100644 --- a/ucw/lib.h +++ b/ucw/lib.h @@ -13,7 +13,7 @@ #ifndef _UCW_LIB_H #define _UCW_LIB_H -#include "ucw/config.h" +#include #include /*** === Macros for handling structures, offsets and alignment ***/ @@ -59,6 +59,7 @@ #define NONRET __attribute__((noreturn)) /** Function does not return **/ #define UNUSED __attribute__((unused)) /** Variable/parameter is knowingly unused **/ #define CONSTRUCTOR __attribute__((constructor)) /** Call function upon start of program **/ +#define CONSTRUCTOR_WITH_PRIORITY(p) __attribute__((constructor(p))) /** Define constructor with a given priority **/ #define PACKED __attribute__((packed)) /** Structure should be packed **/ #define CONST __attribute__((const)) /** Function depends only on arguments **/ #define PURE __attribute__((pure)) /** Function depends only on arguments and global vars **/ @@ -149,6 +150,20 @@ void assert_failed_noinfo(void) NONRET; #define DBG(x,y...) do { } while(0) #endif +#ifdef DEBUG_ASSERTS +/** + * Sometimes, we may want to check that a pointer points to a valid memory + * location before we start using it for anything more complicated. This + * macro checks pointer validity by reading the byte it points to. + **/ +#define ASSERT_READABLE(ptr) ({ volatile char *__p = (ptr); *__p; }) +/** Like the previous macro, but it checks writeability, too. **/ +#define ASSERT_WRITEABLE(ptr) ({ volatile char *__p = (ptr); *__p = *__p; }) +#else +#define ASSERT_READABLE(ptr) do { } while(0) +#define ASSERT_WRITEABLE(ptr) do { } while(0) +#endif + /*** === Memory allocation ***/ /* @@ -178,14 +193,6 @@ void *big_alloc(u64 len) LIKE_MALLOC; /** Allocate a large memory block in the void *big_alloc_zero(u64 len) LIKE_MALLOC; /** Allocate and clear a large memory block. **/ void big_free(void *start, u64 len); /** Free block allocated by @big_alloc() or @big_alloc_zero(). **/ -/*** === Trivial timers (timer.c) ***/ - -timestamp_t get_timestamp(void); /** Get current time as a millisecond timestamp. **/ - -void init_timer(timestamp_t *timer); /** Initialize a timer. **/ -uns get_timer(timestamp_t *timer); /** Get the number of milliseconds since last init/get of a timer. **/ -uns switch_timer(timestamp_t *oldt, timestamp_t *newt); /** Stop ticking of one timer and resume another. **/ - /*** === Random numbers (random.c) ***/ uns random_u32(void); /** Return a pseudorandom 32-bit number. **/