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https://github.com/krgamestudios/Toy.git
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57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
#pragma once
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#include "toy_common.h"
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//NOTE: this is an 'arena allocator', and has restrictions on it's usage:
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// - It can only expand until it is freed
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// - It cannot be copied or moved around in memory
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// - It cannot allocate more memory than it has 'capacity'
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// If each of these rules are followed, this is actually more efficient than other options
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//a custom allocator
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typedef struct Toy_Bucket { //32 | 64 BITNESS
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struct Toy_Bucket* next; //4 | 8
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unsigned int capacity; //4 | 4
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unsigned int count; //4 | 4
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unsigned char data[]; //- | -
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} Toy_Bucket; //12 | 16
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TOY_API Toy_Bucket* Toy_allocateBucket(unsigned int capacity);
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TOY_API unsigned char* Toy_partitionBucket(Toy_Bucket** bucketHandle, unsigned int amount);
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TOY_API void Toy_freeBucket(Toy_Bucket** bucketHandle);
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//standard capacity sizes
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#ifndef TOY_BUCKET_1KB
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#define TOY_BUCKET_1KB (1 << 10)
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#endif
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#ifndef TOY_BUCKET_2KB
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#define TOY_BUCKET_2KB (1 << 11)
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#endif
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#ifndef TOY_BUCKET_4KB
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#define TOY_BUCKET_4KB (1 << 12)
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#endif
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#ifndef TOY_BUCKET_8KB
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#define TOY_BUCKET_8KB (1 << 13)
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#endif
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#ifndef TOY_BUCKET_16KB
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#define TOY_BUCKET_16KB (1 << 14)
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#endif
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#ifndef TOY_BUCKET_32KB
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#define TOY_BUCKET_32KB (1 << 15)
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#endif
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#ifndef TOY_BUCKET_64KB
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#define TOY_BUCKET_64KB (1 << 16)
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#endif
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//CPU L1 caches tend to be 64kb, but that's far from guaranteed
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#ifndef TOY_BUCKET_IDEAL
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#define TOY_BUCKET_IDEAL (TOY_BUCKET_64KB - sizeof(Toy_Bucket))
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#endif
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