75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
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#ifndef FCODER_MEM_H
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#define FCODER_MEM_H
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struct Partition{
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char *base;
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int pos, max;
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};
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struct Temp_Memory{
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void *handle;
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int pos;
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};
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inline Partition
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make_part(void *memory, int size){
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Partition partition;
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partition.base = (char*)memory;
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partition.pos = 0;
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partition.max = size;
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return partition;
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}
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inline void*
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partition_allocate(Partition *data, int size){
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void *ret = 0;
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if (size > 0 && data->pos + size <= data->max){
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ret = data->base + data->pos;
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data->pos += size;
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}
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return ret;
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}
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inline void
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partition_align(Partition *data, unsigned int boundary){
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--boundary;
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data->pos = (data->pos + boundary) & (~boundary);
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}
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inline void*
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partition_current(Partition *data){
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return data->base + data->pos;
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}
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inline int
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partition_remaining(Partition *data){
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return data->max - data->pos;
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}
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inline Partition
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partition_sub_part(Partition *data, int size){
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Partition result = {};
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void *d = partition_allocate(data, size);
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if (d) result = make_part(d, size);
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return result;
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}
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#define push_struct(part, T) (T*)partition_allocate(part, sizeof(T))
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#define push_array(part, T, size) (T*)partition_allocate(part, sizeof(T)*(size))
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#define push_block(part, size) partition_allocate(part, size)
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inline Temp_Memory
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begin_temp_memory(Partition *data){
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Temp_Memory result;
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result.handle = data;
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result.pos = data->pos;
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return result;
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}
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inline void
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end_temp_memory(Temp_Memory temp){
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((Partition*)temp.handle)->pos = temp.pos;
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}
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#endif
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