4coder/4ed_debug_mem.h

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/*
* Mr. 4th Dimention - Allen Webster
*
* 01.14.2017
*
*
*
*/
// TOP
#ifndef FED_DEBUG_MEM_H
#define FED_DEBUG_MEM_H
// NOTE(allen): revent any future instantiation of 4coder_mem.h
#define FCODER_MEM_H
#if !defined(OS_PAGE_SIZE)
#define OS_PAGE_SIZE 4096
#endif
struct Debug_GM{
System_Functions *system;
};
static void
debug_gm_open(System_Functions *system, Debug_GM *general, void *memory, i32 size){
general->system = system;
}
static void*
debug_gm_allocate(Debug_GM *general, int32_t size){
System_Functions *system = general->system;
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local_persist u32 round_val = OS_PAGE_SIZE-1;
size = (size + round_val) & (~round_val);
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void *result = system->memory_allocate(size + OS_PAGE_SIZE);
system->memory_set_protection((u8*)result + size, OS_PAGE_SIZE, 0);
return(result);
}
static void
debug_gm_free(Debug_GM *general, void *memory){
System_Functions *system = general->system;
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system->memory_free(memory, 0);
}
static void*
debug_gm_reallocate(Debug_GM *general, void *old, int32_t old_size, int32_t size){
void *result = debug_gm_allocate(general, size);
memcpy(result, old, old_size);
debug_gm_free(general, old);
return(result);
}
inline void*
debug_gm_reallocate_nocopy(Debug_GM *general, void *old, int32_t size){
debug_gm_free(general, old);
void *result = debug_gm_allocate(general, size);
return(result);
}
// Redefine the normal general memory names to go to these debug names.
#define General_Memory Debug_GM
struct Debug_Mem_Options{
Partition part;
General_Memory general;
};
#define Mem_Options Debug_Mem_Options
#define general_memory_open(sys,gen,mem,siz) debug_gm_open(sys,gen,mem,siz)
#define general_memory_allocate(gen,siz) debug_gm_allocate(gen,siz)
#define general_memory_free(gen,siz) debug_gm_free(gen,siz)
#define general_memory_reallocate(gen,old,old_size,new_size) debug_gm_reallocate(gen,old,old_size,new_size)
#define general_memory_reallocate_nocopy(gen,old,new_size) debug_gm_reallocate_nocopy(gen,old,new_size)
#endif
// BOTTOM