Function mbedtls_memory_buffer_alloc_init

library/memory_buffer_alloc.c:576–606

#endif /* MBEDTLS_THREADING_C */

void mbedtls_memory_buffer_alloc_init( unsigned char *buf, size_t len )
{
    memset( &heap, 0, sizeof(buffer_alloc_ctx) );
    memset( buf, 0, len );

#if defined(MBEDTLS_THREADING_C)
    mbedtls_mutex_init( &heap.mutex );
    mbedtls_platform_set_calloc_free( buffer_alloc_calloc_mutexed,
                              buffer_alloc_free_mutexed );
#else
    mbedtls_platform_set_calloc_free( buffer_alloc_calloc, buffer_alloc_free );
#endif

    if( (size_t) buf % MBEDTLS_MEMORY_ALIGN_MULTIPLE )
    {
        /* Adjust len first since buf is used in the computation */
        len -= MBEDTLS_MEMORY_ALIGN_MULTIPLE
             - (size_t) buf % MBEDTLS_MEMORY_ALIGN_MULTIPLE;
        buf += MBEDTLS_MEMORY_ALIGN_MULTIPLE
             - (size_t) buf % MBEDTLS_MEMORY_ALIGN_MULTIPLE;
    }

    heap.buf = buf;
    heap.len = len;

    heap.first = (memory_header *) buf;
    heap.first->size = len - sizeof(memory_header);
    heap.first->magic1 = MAGIC1;
    heap.first->magic2 = MAGIC2;
    heap.first_free = heap.first;
}

void mbedtls_memory_buffer_alloc_free()
{