source: soft/giet_vm/libs/common.h @ 178

//////////////////////////////////////////////////////////////////////////////////
// File         : common.h         
// Date         : 20/07/2012
// Maintener    : mohamed karaoui
// Copyright (c) UPMC-LIP6
///////////////////////////////////////////////////////////////////////////////////

#ifndef _COMMON_H_
#define _COMMON_H_

/*
 * memcpy, memset function
 * This function is required because it can be gnerated by GCC 
 * during compilation so we must provide it.
 * Code taken from MutekH.
 */
//////////////////////////////////////////////////////////////////////////
static inline void *memcpy(void *_dst, const void *_src, unsigned int size)
{
    unsigned int *dst = _dst;
    const unsigned int *src = _src;

    /* if source and destination buffer are word-aligned,
     * then copy word-by-word */
    if (!((unsigned int)dst & 3) && !((unsigned int)src & 3))
        while (size > 3) {
            *dst++ = *src++;
            size -= 4;
        }

    unsigned char *cdst = (unsigned char*)dst;
    unsigned char *csrc = (unsigned char*)src;

    /* byte-by-byte copy */
    while (size--) {
        *cdst++ = *csrc++;
    }
    return _dst;
}

//////////////////////////////////////////////////////////
static inline void * memset(void *dst, int s, unsigned int count)
{
        char *a = (char *) dst;
        while (count--)
                *a++ = (char)s;
        return dst;
}

/**
   the same as the C assert.
   Taken from Mutekh(SRL API)
 */
#define assert(expr)                                                                                                \
    do {                                                                                                                                \
        if ( ! (expr) ) {                                                                                               \
            giet_tty_printf("assertion (%s) failed on %s:%d !\n",  \
                                                   #expr, __FILE__, __LINE__ );                                 \
            __abort();                                                                                          \
        }                                                                                                                               \
    } while(0)

/**
   @this aborts the current execution.
   Taken from Mutekh(SRL API)
 */
static inline void __abort()
{
        asm volatile ("break 0");
        while(1);
}

#endif /* _COMMON_H_ */