futriix/deps/jemalloc/include/jemalloc/internal/jemalloc_internal_inlines_c.h

#ifndef JEMALLOC_INTERNAL_INLINES_C_H
#define JEMALLOC_INTERNAL_INLINES_C_H

#include "jemalloc/internal/jemalloc_internal_types.h"
#include "jemalloc/internal/sz.h"
#include "jemalloc/internal/witness.h"

/*
 * Translating the names of the 'i' functions:
 *   Abbreviations used in the first part of the function name (before
 *   alloc/dalloc) describe what that function accomplishes:
 *     a: arena (query)
 *     s: size (query, or sized deallocation)
 *     e: extent (query)
 *     p: aligned (allocates)
 *     vs: size (query, without knowing that the pointer is into the heap)
 *     r: rallocx implementation
 *     x: xallocx implementation
 *   Abbreviations used in the second part of the function name (after
 *   alloc/dalloc) describe the arguments it takes
 *     z: whether to return zeroed memory
 *     t: accepts a tcache_t * parameter
 *     m: accepts an arena_t * parameter
 */

JEMALLOC_ALWAYS_INLINE arena_t *
iaalloc(tsdn_t *tsdn, const void *ptr) {
	assert(ptr != NULL);

	return arena_aalloc(tsdn, ptr);
}

JEMALLOC_ALWAYS_INLINE size_t
isalloc(tsdn_t *tsdn, const void *ptr) {
	assert(ptr != NULL);

	return arena_salloc(tsdn, ptr);
}

JEMALLOC_ALWAYS_INLINE void *
iallocztm(tsdn_t *tsdn, size_t size, szind_t ind, bool zero, tcache_t *tcache,
    bool is_internal, arena_t *arena, bool slow_path) {
	void *ret;

	assert(size != 0);
	assert(!is_internal || tcache == NULL);
	assert(!is_internal || arena == NULL || arena_is_auto(arena));
	if (!tsdn_null(tsdn) && tsd_reentrancy_level_get(tsdn_tsd(tsdn)) == 0) {
		witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
		    WITNESS_RANK_CORE, 0);
	}

	ret = arena_malloc(tsdn, arena, size, ind, zero, tcache, slow_path);
	if (config_stats && is_internal && likely(ret != NULL)) {
		arena_internal_add(iaalloc(tsdn, ret), isalloc(tsdn, ret));
	}
	return ret;
}

JEMALLOC_ALWAYS_INLINE void *
ialloc(tsd_t *tsd, size_t size, szind_t ind, bool zero, bool slow_path) {
	return iallocztm(tsd_tsdn(tsd), size, ind, zero, tcache_get(tsd), false,
	    NULL, slow_path);
}

JEMALLOC_ALWAYS_INLINE void *
ipallocztm(tsdn_t *tsdn, size_t usize, size_t alignment, bool zero,
    tcache_t *tcache, bool is_internal, arena_t *arena) {
	void *ret;

	assert(usize != 0);
	assert(usize == sz_sa2u(usize, alignment));
	assert(!is_internal || tcache == NULL);
	assert(!is_internal || arena == NULL || arena_is_auto(arena));
	witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
	    WITNESS_RANK_CORE, 0);

	ret = arena_palloc(tsdn, arena, usize, alignment, zero, tcache);
	assert(ALIGNMENT_ADDR2BASE(ret, alignment) == ret);
	if (config_stats && is_internal && likely(ret != NULL)) {
		arena_internal_add(iaalloc(tsdn, ret), isalloc(tsdn, ret));
	}
	return ret;
}

JEMALLOC_ALWAYS_INLINE void *
ipalloct(tsdn_t *tsdn, size_t usize, size_t alignment, bool zero,
    tcache_t *tcache, arena_t *arena) {
	return ipallocztm(tsdn, usize, alignment, zero, tcache, false, arena);
}

JEMALLOC_ALWAYS_INLINE void *
ipalloc(tsd_t *tsd, size_t usize, size_t alignment, bool zero) {
	return ipallocztm(tsd_tsdn(tsd), usize, alignment, zero,
	    tcache_get(tsd), false, NULL);
}

JEMALLOC_ALWAYS_INLINE size_t
ivsalloc(tsdn_t *tsdn, const void *ptr) {
	return arena_vsalloc(tsdn, ptr);
}

JEMALLOC_ALWAYS_INLINE void
idalloctm(tsdn_t *tsdn, void *ptr, tcache_t *tcache, alloc_ctx_t *alloc_ctx,
    bool is_internal, bool slow_path) {
	assert(ptr != NULL);
	assert(!is_internal || tcache == NULL);
	assert(!is_internal || arena_is_auto(iaalloc(tsdn, ptr)));
	witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
	    WITNESS_RANK_CORE, 0);
	if (config_stats && is_internal) {
		arena_internal_sub(iaalloc(tsdn, ptr), isalloc(tsdn, ptr));
	}
	if (!is_internal && !tsdn_null(tsdn) &&
	    tsd_reentrancy_level_get(tsdn_tsd(tsdn)) != 0) {
		assert(tcache == NULL);
	}
	arena_dalloc(tsdn, ptr, tcache, alloc_ctx, slow_path);
}

JEMALLOC_ALWAYS_INLINE void
idalloc(tsd_t *tsd, void *ptr) {
	idalloctm(tsd_tsdn(tsd), ptr, tcache_get(tsd), NULL, false, true);
}

JEMALLOC_ALWAYS_INLINE void
isdalloct(tsdn_t *tsdn, void *ptr, size_t size, tcache_t *tcache,
    alloc_ctx_t *alloc_ctx, bool slow_path) {
	witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
	    WITNESS_RANK_CORE, 0);
	arena_sdalloc(tsdn, ptr, size, tcache, alloc_ctx, slow_path);
}

JEMALLOC_ALWAYS_INLINE void *
iralloct_realign(tsdn_t *tsdn, void *ptr, size_t oldsize, size_t size,
    size_t extra, size_t alignment, bool zero, tcache_t *tcache,
    arena_t *arena) {
	witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
	    WITNESS_RANK_CORE, 0);
	void *p;
	size_t usize, copysize;

	usize = sz_sa2u(size + extra, alignment);
	if (unlikely(usize == 0 || usize > LARGE_MAXCLASS)) {
		return NULL;
	}
	p = ipalloct(tsdn, usize, alignment, zero, tcache, arena);
	if (p == NULL) {
		if (extra == 0) {
			return NULL;
		}
		/* Try again, without extra this time. */
		usize = sz_sa2u(size, alignment);
		if (unlikely(usize == 0 || usize > LARGE_MAXCLASS)) {
			return NULL;
		}
		p = ipalloct(tsdn, usize, alignment, zero, tcache, arena);
		if (p == NULL) {
			return NULL;
		}
	}
	/*
	 * Copy at most size bytes (not size+extra), since the caller has no
	 * expectation that the extra bytes will be reliably preserved.
	 */
	copysize = (size < oldsize) ? size : oldsize;
	memcpy(p, ptr, copysize);
	isdalloct(tsdn, ptr, oldsize, tcache, NULL, true);
	return p;
}

JEMALLOC_ALWAYS_INLINE void *
iralloct(tsdn_t *tsdn, void *ptr, size_t oldsize, size_t size, size_t alignment,
    bool zero, tcache_t *tcache, arena_t *arena) {
	assert(ptr != NULL);
	assert(size != 0);
	witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
	    WITNESS_RANK_CORE, 0);

	if (alignment != 0 && ((uintptr_t)ptr & ((uintptr_t)alignment-1))
	    != 0) {
		/*
		 * Existing object alignment is inadequate; allocate new space
		 * and copy.
		 */
		return iralloct_realign(tsdn, ptr, oldsize, size, 0, alignment,
		    zero, tcache, arena);
	}

	return arena_ralloc(tsdn, arena, ptr, oldsize, size, alignment, zero,
	    tcache);
}

JEMALLOC_ALWAYS_INLINE void *
iralloc(tsd_t *tsd, void *ptr, size_t oldsize, size_t size, size_t alignment,
    bool zero) {
	return iralloct(tsd_tsdn(tsd), ptr, oldsize, size, alignment, zero,
	    tcache_get(tsd), NULL);
}

JEMALLOC_ALWAYS_INLINE bool
ixalloc(tsdn_t *tsdn, void *ptr, size_t oldsize, size_t size, size_t extra,
    size_t alignment, bool zero) {
	assert(ptr != NULL);
	assert(size != 0);
	witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
	    WITNESS_RANK_CORE, 0);

	if (alignment != 0 && ((uintptr_t)ptr & ((uintptr_t)alignment-1))
	    != 0) {
		/* Existing object alignment is inadequate. */
		return true;
	}

	return arena_ralloc_no_move(tsdn, ptr, oldsize, size, extra, zero);
}

JEMALLOC_ALWAYS_INLINE int
iget_defrag_hint(tsdn_t *tsdn, void* ptr) {
	int defrag = 0;
	rtree_ctx_t rtree_ctx_fallback;
	rtree_ctx_t *rtree_ctx = tsdn_rtree_ctx(tsdn, &rtree_ctx_fallback);
	szind_t szind;
	bool is_slab;
	rtree_szind_slab_read(tsdn, &extents_rtree, rtree_ctx, (uintptr_t)ptr, true, &szind, &is_slab);
	if (likely(is_slab)) {
		/* Small allocation. */
		extent_t *slab = iealloc(tsdn, ptr);
		arena_t *arena = extent_arena_get(slab);
		szind_t binind = extent_szind_get(slab);
		bin_t *bin = &arena->bins[binind];
		malloc_mutex_lock(tsdn, &bin->lock);
		/* don't bother moving allocations from the slab currently used for new allocations */
		if (slab != bin->slabcur) {
			int free_in_slab = extent_nfree_get(slab);
			if (free_in_slab) {
				const bin_info_t *bin_info = &bin_infos[binind];
				int curslabs = bin->stats.curslabs;
				size_t curregs = bin->stats.curregs;
				if (bin->slabcur) {
					/* remove slabcur from the overall utilization */
					curregs -= bin_info->nregs - extent_nfree_get(bin->slabcur);
					curslabs -= 1;
				}
				/* Compare the utilization ratio of the slab in question to the total average,
				 * to avoid precision lost and division, we do that by extrapolating the usage
				 * of the slab as if all slabs have the same usage. If this slab is less used 
				 * than the average, we'll prefer to evict the data to hopefully more used ones */
				defrag = (bin_info->nregs - free_in_slab) * curslabs <= curregs;
			}
		}
		malloc_mutex_unlock(tsdn, &bin->lock);
	}
	return defrag;
}

#endif /* JEMALLOC_INTERNAL_INLINES_C_H */