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add c11_chunkedvector

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blueloveTH 2025-06-19 11:57:32 +08:00
parent 03e368b755
commit 10a3c0885b
2 changed files with 67 additions and 0 deletions
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32
include/pocketpy/common/chunkedvector.h Normal file
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#pragma once
#include "vector.h"
typedef struct c11_chunkedvector_chunk {
int length;
int capacity;
int elem_size;
void* data;
} c11_chunkedvector_chunk;
typedef struct c11_chunkedvector {
c11_vector /*T=c11_chunkedvector_chunk*/ chunks;
int length;
int capacity;
int elem_size;
int initial_chunks;
} c11_chunkedvector;
// chunks[0]: size=1, total_capacity=1
// chunks[1]: size=2, total_capacity=3
// chunks[2]: size=4, total_capacity=7
// chunks[3]: size=8, total_capacity=15
// chunks[4]: size=16, total_capacity=31
// chunks[5]: size=32, total_capacity=63
// ...
// chunks[n]: size=2^n, total_capacity=2^(n+1)-1
void c11_chunkedvector__ctor(c11_chunkedvector* self, int elem_size, int initial_chunks);
void c11_chunkedvector__dtor(c11_chunkedvector* self);
void* c11_chunkedvector__emplace(c11_chunkedvector* self);
void* c11_chunkedvector__at(c11_chunkedvector* self, int index);

35
src/common/chunkedvector.c Normal file
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#include "pocketpy/common/chunkedvector.h"
#include <stdlib.h>
#include <string.h>
#include "pocketpy/common/utils.h"
#include "pocketpy/config.h"
void c11_chunkedvector__ctor(c11_chunkedvector* self, int elem_size, int initial_chunks) {
c11_vector__ctor(&self->chunks, sizeof(c11_chunkedvector_chunk));
self->length = 0;
self->capacity = 0;
self->elem_size = elem_size;
self->initial_chunks = initial_chunks;
for(int i = 0; i < initial_chunks; i++) {
// TODO: optimize?
c11_chunkedvector_chunk chunk;
chunk.length = 0;
chunk.capacity = (1 << i);
chunk.elem_size = elem_size;
chunk.data = PK_MALLOC(chunk.capacity * elem_size);
c11_vector__push(c11_chunkedvector_chunk, &self->chunks, chunk);
initial_capacity += chunk.capacity;
}
}
void c11_chunkedvector__dtor(c11_chunkedvector* self) {}
void* c11_chunkedvector__emplace(c11_chunkedvector* self) {}
static int c11__bit_length(unsigned int n) { return n == 0 ? 0 : 32 - __builtin_clz(n); }
void* c11_chunkedvector__at(c11_chunkedvector* self, int index) {
int chunk_index = c11__bit_length(index) - 1;
}