server-skynet-source-3rd-jemalloc/include/jemalloc/internal/tcache_inlines.h

#ifndef JEMALLOC_INTERNAL_TCACHE_INLINES_H
#define JEMALLOC_INTERNAL_TCACHE_INLINES_H

#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/arena_externs.h"
#include "jemalloc/internal/bin.h"
#include "jemalloc/internal/jemalloc_internal_inlines_b.h"
#include "jemalloc/internal/jemalloc_internal_types.h"
#include "jemalloc/internal/large_externs.h"
#include "jemalloc/internal/san.h"
#include "jemalloc/internal/sc.h"
#include "jemalloc/internal/sz.h"
#include "jemalloc/internal/tcache_externs.h"
#include "jemalloc/internal/util.h"

static inline bool
tcache_enabled_get(tsd_t *tsd) {
	return tsd_tcache_enabled_get(tsd);
}

static inline void
tcache_enabled_set(tsd_t *tsd, bool enabled) {
	bool was_enabled = tsd_tcache_enabled_get(tsd);

	if (!was_enabled && enabled) {
		tsd_tcache_data_init(tsd, NULL);
	} else if (was_enabled && !enabled) {
		tcache_cleanup(tsd);
	}
	/* Commit the state last.  Above calls check current state. */
	tsd_tcache_enabled_set(tsd, enabled);
	tsd_slow_update(tsd);
}

static inline unsigned
tcache_nhbins_get(tcache_t *tcache) {
	assert(tcache != NULL);
	assert(tcache->tcache_nhbins <= TCACHE_NBINS_MAX);
	return tcache->tcache_nhbins;
}

static inline size_t
tcache_max_get(tcache_t *tcache) {
	assert(tcache != NULL);
	assert(tcache->tcache_max <= TCACHE_MAXCLASS_LIMIT);
	return tcache->tcache_max;
}

static inline void
tcache_max_and_nhbins_set(tcache_t *tcache, size_t tcache_max) {
	assert(tcache != NULL);
	assert(tcache_max <= TCACHE_MAXCLASS_LIMIT);
	tcache->tcache_max = tcache_max;
	tcache->tcache_nhbins = sz_size2index(tcache_max) + 1;
}

static inline void
thread_tcache_max_and_nhbins_set(tsd_t *tsd, size_t tcache_max) {
	assert(tcache_max <= TCACHE_MAXCLASS_LIMIT);
	assert(tcache_max == sz_s2u(tcache_max));
	tcache_t *tcache = tsd_tcachep_get(tsd);
	tcache_slow_t *tcache_slow;
	assert(tcache != NULL);

	bool enabled = tcache_available(tsd);
	arena_t *assigned_arena;
	if (enabled) {
		tcache_slow = tcache_slow_get(tsd);
		assert(tcache != NULL && tcache_slow != NULL);
		assigned_arena = tcache_slow->arena;
		/* Shutdown and reboot the tcache for a clean slate. */
		tcache_cleanup(tsd);
	}

	/*
	* Still set tcache_max and tcache_nhbins of the tcache even if
	* the tcache is not available yet because the values are
	* stored in tsd_t and are always available for changing.
	*/
	tcache_max_and_nhbins_set(tcache, tcache_max);

	if (enabled) {
		tsd_tcache_data_init(tsd, assigned_arena);
	}

	assert(tcache_nhbins_get(tcache) == sz_size2index(tcache_max) + 1);
}

JEMALLOC_ALWAYS_INLINE bool
tcache_small_bin_disabled(szind_t ind, cache_bin_t *bin) {
	assert(ind < SC_NBINS);
	assert(bin != NULL);
	bool ret = cache_bin_info_ncached_max(&bin->bin_info) == 0;
	if (ret) {
		/* small size class but cache bin disabled. */
		assert((uintptr_t)(*bin->stack_head) ==
		    cache_bin_preceding_junk);
	}

	return ret;
}

JEMALLOC_ALWAYS_INLINE bool
tcache_large_bin_disabled(szind_t ind, cache_bin_t *bin) {
	assert(ind >= SC_NBINS);
	assert(bin != NULL);
	return (cache_bin_info_ncached_max(&bin->bin_info) == 0 ||
	    cache_bin_still_zero_initialized(bin));
}

JEMALLOC_ALWAYS_INLINE void *
tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache,
    size_t size, szind_t binind, bool zero, bool slow_path) {
	void *ret;
	bool tcache_success;

	assert(binind < SC_NBINS);
	cache_bin_t *bin = &tcache->bins[binind];
	ret = cache_bin_alloc(bin, &tcache_success);
	assert(tcache_success == (ret != NULL));
	if (unlikely(!tcache_success)) {
		bool tcache_hard_success;
		arena = arena_choose(tsd, arena);
		if (unlikely(arena == NULL)) {
			return NULL;
		}
		if (unlikely(tcache_small_bin_disabled(binind, bin))) {
			/* stats and zero are handled directly by the arena. */
			return arena_malloc_hard(tsd_tsdn(tsd), arena, size,
			    binind, zero, /* slab */ true);
		}
		tcache_bin_flush_stashed(tsd, tcache, bin, binind,
		    /* is_small */ true);

		ret = tcache_alloc_small_hard(tsd_tsdn(tsd), arena, tcache,
		    bin, binind, &tcache_hard_success);
		if (tcache_hard_success == false) {
			return NULL;
		}
	}

	assert(ret);
	if (unlikely(zero)) {
		size_t usize = sz_index2size(binind);
		assert(tcache_salloc(tsd_tsdn(tsd), ret) == usize);
		memset(ret, 0, usize);
	}
	if (config_stats) {
		bin->tstats.nrequests++;
	}
	return ret;
}

JEMALLOC_ALWAYS_INLINE void *
tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
    szind_t binind, bool zero, bool slow_path) {
	void *ret;
	bool tcache_success;

	assert(binind >= SC_NBINS && binind < tcache_nhbins_get(tcache));
	cache_bin_t *bin = &tcache->bins[binind];
	ret = cache_bin_alloc(bin, &tcache_success);
	assert(tcache_success == (ret != NULL));
	if (unlikely(!tcache_success)) {
		/*
		 * Only allocate one large object at a time, because it's quite
		 * expensive to create one and not use it.
		 */
		arena = arena_choose(tsd, arena);
		if (unlikely(arena == NULL)) {
			return NULL;
		}
		tcache_bin_flush_stashed(tsd, tcache, bin, binind,
		    /* is_small */ false);

		ret = large_malloc(tsd_tsdn(tsd), arena, sz_s2u(size), zero);
		if (ret == NULL) {
			return NULL;
		}
	} else {
		if (unlikely(zero)) {
			size_t usize = sz_index2size(binind);
			assert(usize <= tcache_max_get(tcache));
			memset(ret, 0, usize);
		}

		if (config_stats) {
			bin->tstats.nrequests++;
		}
	}

	return ret;
}

JEMALLOC_ALWAYS_INLINE void
tcache_dalloc_small(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
    bool slow_path) {
	assert(tcache_salloc(tsd_tsdn(tsd), ptr) <= SC_SMALL_MAXCLASS);

	cache_bin_t *bin = &tcache->bins[binind];
	/*
	 * Not marking the branch unlikely because this is past free_fastpath()
	 * (which handles the most common cases), i.e. at this point it's often
	 * uncommon cases.
	 */
	if (cache_bin_nonfast_aligned(ptr)) {
		/* Junk unconditionally, even if bin is full. */
		san_junk_ptr(ptr, sz_index2size(binind));
		if (cache_bin_stash(bin, ptr)) {
			return;
		}
		assert(cache_bin_full(bin));
		/* Bin full; fall through into the flush branch. */
	}

	if (unlikely(!cache_bin_dalloc_easy(bin, ptr))) {
		if (unlikely(tcache_small_bin_disabled(binind, bin))) {
			arena_dalloc_small(tsd_tsdn(tsd), ptr);
			return;
		}
		cache_bin_sz_t max = cache_bin_info_ncached_max(
		    &bin->bin_info);
		unsigned remain = max >> opt_lg_tcache_flush_small_div;
		tcache_bin_flush_small(tsd, tcache, bin, binind, remain);
		bool ret = cache_bin_dalloc_easy(bin, ptr);
		assert(ret);
	}
}

JEMALLOC_ALWAYS_INLINE void
tcache_dalloc_large(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
    bool slow_path) {

	assert(tcache_salloc(tsd_tsdn(tsd), ptr) > SC_SMALL_MAXCLASS);
	assert(tcache_salloc(tsd_tsdn(tsd), ptr) <= tcache_max_get(tcache));

	cache_bin_t *bin = &tcache->bins[binind];
	if (unlikely(!cache_bin_dalloc_easy(bin, ptr))) {
		unsigned remain = cache_bin_info_ncached_max(
		    &bin->bin_info) >> opt_lg_tcache_flush_large_div;
		tcache_bin_flush_large(tsd, tcache, bin, binind, remain);
		bool ret = cache_bin_dalloc_easy(bin, ptr);
		assert(ret);
	}
}

JEMALLOC_ALWAYS_INLINE tcache_t *
tcaches_get(tsd_t *tsd, unsigned ind) {
	tcaches_t *elm = &tcaches[ind];
	if (unlikely(elm->tcache == NULL)) {
		malloc_printf("<jemalloc>: invalid tcache id (%u).\n", ind);
		abort();
	} else if (unlikely(elm->tcache == TCACHES_ELM_NEED_REINIT)) {
		elm->tcache = tcache_create_explicit(tsd);
	}
	return elm->tcache;
}

#endif /* JEMALLOC_INTERNAL_TCACHE_INLINES_H */