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

#ifndef JEMALLOC_INTERNAL_INLINES_A_H
#define JEMALLOC_INTERNAL_INLINES_A_H

#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/bit_util.h"
#include "jemalloc/internal/jemalloc_internal_types.h"
#include "jemalloc/internal/sc.h"
#include "jemalloc/internal/ticker.h"

JEMALLOC_ALWAYS_INLINE malloc_cpuid_t
malloc_getcpu(void) {
	assert(have_percpu_arena);
#if defined(_WIN32)
	return GetCurrentProcessorNumber();
#elif defined(JEMALLOC_HAVE_SCHED_GETCPU)
	return (malloc_cpuid_t)sched_getcpu();
#elif defined(JEMALLOC_HAVE_RDTSCP)
	unsigned int ax, cx, dx;
	asm volatile("rdtscp" : "=a"(ax), "=d"(dx), "=c"(cx) ::);
	return (malloc_cpuid_t)(dx & 0xfff);
#elif defined(__aarch64__) && defined(__APPLE__)
	/* Other oses most likely use tpidr_el0 instead */
	uintptr_t c;
	asm volatile("mrs %x0, tpidrro_el0" : "=r"(c) :: "memory");
	return (malloc_cpuid_t)(c & (1 << 3) - 1);
#else
	not_reached();
	return -1;
#endif
}

/* Return the chosen arena index based on current cpu. */
JEMALLOC_ALWAYS_INLINE unsigned
percpu_arena_choose(void) {
	assert(have_percpu_arena && PERCPU_ARENA_ENABLED(opt_percpu_arena));

	malloc_cpuid_t cpuid = malloc_getcpu();
	assert(cpuid >= 0);

	unsigned arena_ind;
	if ((opt_percpu_arena == percpu_arena) || ((unsigned)cpuid < ncpus /
	    2)) {
		arena_ind = cpuid;
	} else {
		assert(opt_percpu_arena == per_phycpu_arena);
		/* Hyper threads on the same physical CPU share arena. */
		arena_ind = cpuid - ncpus / 2;
	}

	return arena_ind;
}

/* Return the limit of percpu auto arena range, i.e. arenas[0...ind_limit). */
JEMALLOC_ALWAYS_INLINE unsigned
percpu_arena_ind_limit(percpu_arena_mode_t mode) {
	assert(have_percpu_arena && PERCPU_ARENA_ENABLED(mode));
	if (mode == per_phycpu_arena && ncpus > 1) {
		if (ncpus % 2) {
			/* This likely means a misconfig. */
			return ncpus / 2 + 1;
		}
		return ncpus / 2;
	} else {
		return ncpus;
	}
}

static inline arena_t *
arena_get(tsdn_t *tsdn, unsigned ind, bool init_if_missing) {
	arena_t *ret;

	assert(ind < MALLOCX_ARENA_LIMIT);

	ret = (arena_t *)atomic_load_p(&arenas[ind], ATOMIC_ACQUIRE);
	if (unlikely(ret == NULL)) {
		if (init_if_missing) {
			ret = arena_init(tsdn, ind, &arena_config_default);
		}
	}
	return ret;
}

JEMALLOC_ALWAYS_INLINE bool
tcache_available(tsd_t *tsd) {
	/*
	 * Thread specific auto tcache might be unavailable if: 1) during tcache
	 * initialization, or 2) disabled through thread.tcache.enabled mallctl
	 * or config options.  This check covers all cases.
	 */
	if (likely(tsd_tcache_enabled_get(tsd))) {
		/* Associated arena == NULL implies tcache init in progress. */
		if (config_debug && tsd_tcache_slowp_get(tsd)->arena != NULL) {
			tcache_assert_initialized(tsd_tcachep_get(tsd));
		}
		return true;
	}

	return false;
}

JEMALLOC_ALWAYS_INLINE tcache_t *
tcache_get(tsd_t *tsd) {
	if (!tcache_available(tsd)) {
		return NULL;
	}

	return tsd_tcachep_get(tsd);
}

JEMALLOC_ALWAYS_INLINE tcache_slow_t *
tcache_slow_get(tsd_t *tsd) {
	if (!tcache_available(tsd)) {
		return NULL;
	}

	return tsd_tcache_slowp_get(tsd);
}

static inline void
pre_reentrancy(tsd_t *tsd, arena_t *arena) {
	/* arena is the current context.  Reentry from a0 is not allowed. */
	assert(arena != arena_get(tsd_tsdn(tsd), 0, false));
	tsd_pre_reentrancy_raw(tsd);
}

static inline void
post_reentrancy(tsd_t *tsd) {
	tsd_post_reentrancy_raw(tsd);
}

#endif /* JEMALLOC_INTERNAL_INLINES_A_H */