https://github.com/JuliaLang/julia
Tip revision: 3c4f517563e714c2a4cf121d17872d3456c1b91c authored by bors[bot] on 03 December 2018, 09:24:52 UTC
Merge #30224
Merge #30224
Tip revision: 3c4f517
typemap.c
// This file is a part of Julia. License is MIT: https://julialang.org/license
#include <stdlib.h>
#include <string.h>
#include "julia.h"
#include "julia_internal.h"
#ifndef _OS_WINDOWS_
#include <unistd.h>
#endif
#include "julia_assert.h"
#define MAX_METHLIST_COUNT 12 // this can strongly affect the sysimg size and speed!
#define INIT_CACHE_SIZE 8 // must be a power-of-two
#ifdef __cplusplus
extern "C" {
#endif
// compute whether the specificity of this type is equivalent to Any in the sort order
static int jl_is_any(jl_value_t *t1)
{
return (t1 == (jl_value_t*)jl_any_type ||
(jl_is_typevar(t1) &&
((jl_tvar_t*)t1)->ub == (jl_value_t*)jl_any_type));
}
// ----- Type Signature Subtype Testing ----- //
static int sig_match_by_type_leaf(jl_value_t **types, jl_tupletype_t *sig, size_t n)
{
size_t i;
for (i = 0; i < n; i++) {
jl_value_t *decl = jl_field_type(sig, i);
jl_value_t *a = types[i];
if (jl_is_type_type(a)) // decl is not Type, because it wouldn't be leafsig
a = jl_typeof(jl_tparam0(a));
if (!jl_types_equal(a, decl))
return 0;
}
return 1;
}
static int sig_match_by_type_simple(jl_value_t **types, size_t n, jl_tupletype_t *sig, size_t lensig, int va)
{
size_t i;
if (va) lensig -= 1;
for (i = 0; i < lensig; i++) {
jl_value_t *decl = jl_field_type(sig, i);
jl_value_t *a = types[i];
jl_value_t *unw = jl_is_unionall(decl) ? ((jl_unionall_t*)decl)->body : decl;
if (jl_is_type_type(unw)) {
jl_value_t *tp0 = jl_tparam0(unw);
if (jl_is_type_type(a)) {
if (jl_is_typevar(tp0)) {
// in the case of Type{_}, the types don't have to match exactly.
// this is cached as `Type{T} where T`.
if (((jl_tvar_t*)tp0)->ub != (jl_value_t*)jl_any_type &&
!jl_subtype(jl_tparam0(a), ((jl_tvar_t*)tp0)->ub))
return 0;
}
else if (!jl_types_equal(jl_tparam0(a), tp0)) {
return 0;
}
}
else if (!jl_is_kind(a) || !jl_is_typevar(tp0) || ((jl_tvar_t*)tp0)->ub != (jl_value_t*)jl_any_type) {
// manually unroll jl_subtype(a, decl)
// where `a` can be a subtype and decl is Type{T}
return 0;
}
}
else if (decl == (jl_value_t*)jl_any_type) {
}
else {
if (jl_is_type_type(a)) // decl is not Type, because it would be caught above
a = jl_typeof(jl_tparam0(a));
if (!jl_types_equal(a, decl))
return 0;
}
}
if (va) {
jl_value_t *decl = jl_unwrap_unionall(jl_field_type(sig, i));
if (jl_vararg_kind(decl) == JL_VARARG_INT) {
if (n - i != jl_unbox_long(jl_tparam1(decl)))
return 0;
}
jl_value_t *t = jl_tparam0(decl);
if (jl_is_typevar(t))
t = ((jl_tvar_t*)t)->ub;
for (; i < n; i++) {
if (!jl_subtype(types[i], t))
return 0;
}
return 1;
}
return 1;
}
static inline int sig_match_leaf(jl_value_t **args, jl_value_t **sig, size_t n)
{
// NOTE: This function is a huge performance hot spot!!
size_t i;
for (i = 0; i < n; i++) {
jl_value_t *decl = sig[i];
jl_value_t *a = args[i];
if ((jl_value_t*)jl_typeof(a) != decl) {
/*
we are only matching concrete types here, and those types are
hash-consed, so pointer comparison should work.
*/
return 0;
}
}
return 1;
}
static inline int sig_match_simple(jl_value_t **args, size_t n, jl_value_t **sig,
int va, size_t lensig)
{
// NOTE: This function is a performance hot spot!!
size_t i;
if (va) lensig -= 1;
for (i = 0; i < lensig; i++) {
jl_value_t *decl = sig[i];
jl_value_t *a = args[i];
if (decl == (jl_value_t*)jl_any_type || ((jl_value_t*)jl_typeof(a) == decl)) {
/*
we are only matching concrete types here, and those types are
hash-consed, so pointer comparison should work.
*/
continue;
}
jl_value_t *unw = jl_is_unionall(decl) ? ((jl_unionall_t*)decl)->body : decl;
if (jl_is_type_type(unw) && jl_is_type(a)) {
jl_value_t *tp0 = jl_tparam0(unw);
if (jl_is_typevar(tp0)) {
// in the case of Type{_}, the types don't have to match exactly.
// this is cached as `Type{T} where T`.
if (((jl_tvar_t*)tp0)->ub != (jl_value_t*)jl_any_type &&
!jl_subtype(a, ((jl_tvar_t*)tp0)->ub))
return 0;
}
else {
if (a != tp0) {
jl_datatype_t *da = (jl_datatype_t*)a;
jl_datatype_t *dt = (jl_datatype_t*)tp0;
while (jl_is_unionall(da))
da = (jl_datatype_t*)((jl_unionall_t*)da)->body;
while (jl_is_unionall(dt))
dt = (jl_datatype_t*)((jl_unionall_t*)dt)->body;
if (jl_is_datatype(da) && jl_is_datatype(dt) && da->name != dt->name)
return 0;
if (!jl_types_equal(a, tp0))
return 0;
}
}
}
else {
return 0;
}
}
if (va) {
jl_value_t *decl = sig[i];
if (jl_vararg_kind(decl) == JL_VARARG_INT) {
if (n - i != jl_unbox_long(jl_tparam1(decl)))
return 0;
}
jl_value_t *t = jl_unwrap_vararg(decl);
for (; i < n; i++) {
if (!jl_isa(args[i], t))
return 0;
}
return 1;
}
return 1;
}
// ----- MethodCache helper functions ----- //
static inline size_t jl_intref(const jl_array_t *arr, size_t idx) JL_NOTSAFEPOINT
{
jl_value_t *el = jl_tparam0(jl_typeof(arr));
if (el == (jl_value_t*)jl_uint8_type)
return ((uint8_t*)jl_array_data(arr))[idx];
else if (el == (jl_value_t*)jl_uint16_type)
return ((uint16_t*)jl_array_data(arr))[idx];
else if (el == (jl_value_t*)jl_uint32_type)
return ((uint32_t*)jl_array_data(arr))[idx];
else
abort();
}
static inline void jl_intset(const jl_array_t *arr, size_t idx, size_t val) JL_NOTSAFEPOINT
{
jl_value_t *el = jl_tparam0(jl_typeof(arr));
if (el == (jl_value_t*)jl_uint8_type)
((uint8_t*)jl_array_data(arr))[idx] = val;
else if (el == (jl_value_t*)jl_uint16_type)
((uint16_t*)jl_array_data(arr))[idx] = val;
else if (el == (jl_value_t*)jl_uint32_type)
((uint32_t*)jl_array_data(arr))[idx] = val;
else
abort();
}
static inline size_t jl_max_int(const jl_array_t *arr)
{
jl_value_t *el = jl_tparam0(jl_typeof(arr));
if (el == (jl_value_t*)jl_uint8_type)
return 0xFF;
else if (el == (jl_value_t*)jl_uint16_type)
return 0xFFFF;
else if (el == (jl_value_t*)jl_uint32_type)
return 0xFFFFFFFF;
else
abort();
}
static jl_array_t *jl_alloc_int_1d(size_t np, size_t len)
{
jl_value_t *ty;
if (np < 0xFF) {
ty = jl_array_uint8_type;
}
else if (np < 0xFFFF) {
static jl_value_t *int16 JL_ALWAYS_LEAFTYPE = NULL;
if (int16 == NULL)
int16 = jl_apply_array_type((jl_value_t*)jl_uint16_type, 1);
ty = int16;
}
else {
assert(np < 0x7FFFFFFF);
static jl_value_t *int32 JL_ALWAYS_LEAFTYPE = NULL;
if (int32 == NULL)
int32 = jl_apply_array_type((jl_value_t*)jl_uint32_type, 1);
ty = int32;
}
jl_array_t *a = jl_alloc_array_1d(ty, len);
memset(a->data, 0, len * a->elsize);
return a;
}
static inline
jl_typemap_t *mtcache_hash_lookup(const struct jl_ordereddict_t *a JL_PROPAGATES_ROOT, jl_value_t *ty, int8_t tparam, int8_t offs) JL_NOTSAFEPOINT
{
uintptr_t uid = ((jl_datatype_t*)ty)->uid;
jl_typemap_t *ml = jl_nothing;
if (!uid)
return ml;
size_t idx = jl_intref(a->indices, uid & (a->indices->nrows-1));
if (idx > 0) {
ml = jl_array_ptr_ref(a->values, idx - 1);
if (ml == jl_nothing)
return ml;
jl_value_t *t;
if (jl_typeof(ml) == (jl_value_t*)jl_typemap_level_type) {
t = ((jl_typemap_level_t*)ml)->key;
}
else {
t = jl_field_type(jl_unwrap_unionall(jl_typemap_entry_sig(ml)), offs);
if (tparam)
t = jl_tparam0(t);
}
if (t != ty)
ml = jl_nothing;
}
return ml;
}
static void mtcache_rehash(struct jl_ordereddict_t *pa, size_t newlen, jl_value_t *parent, int8_t tparam, int8_t offs)
{
size_t i, nval = jl_array_len(pa->values);
jl_array_t *n = jl_alloc_int_1d(nval + 1, newlen);
for (i = 1; i <= nval; i++) {
jl_typemap_t *ml = jl_array_ptr_ref(pa->values, i - 1);
if (ml == jl_nothing)
continue;
jl_value_t *t;
if (jl_typeof(ml) == (jl_value_t*)jl_typemap_level_type) {
t = ((jl_typemap_level_t*)ml)->key;
}
else {
t = jl_field_type(jl_unwrap_unionall(jl_typemap_entry_sig(ml)), offs);
if (tparam)
t = jl_tparam0(t);
}
uintptr_t uid = ((jl_datatype_t*)t)->uid;
size_t newi = uid & (newlen - 1);
if (jl_intref(n, newi) == 0) {
jl_intset(n, newi, i);
}
else {
// hash collision: start over after doubling the size again
i = 0;
newlen *= 2;
n = jl_alloc_int_1d(nval + 1, newlen);
}
}
pa->indices = n;
jl_gc_wb(parent, n);
}
// Recursively rehash a TypeMap (for example, after deserialization)
void jl_typemap_rehash(jl_typemap_t *ml, int8_t offs);
void jl_typemap_rehash_array(struct jl_ordereddict_t *pa, jl_value_t *parent, int8_t tparam, int8_t offs)
{
size_t i, len = jl_array_len(pa->values);
for (i = 0; i < len; i++) {
jl_typemap_t *ml = jl_array_ptr_ref(pa->values, i);
assert(ml != NULL);
jl_typemap_rehash(ml, offs+1);
}
mtcache_rehash(pa, 4 * next_power_of_two(len), parent, tparam, offs);
}
void jl_typemap_rehash(jl_typemap_t *ml, int8_t offs)
{
if (jl_typeof(ml) == (jl_value_t*)jl_typemap_level_type) {
jl_typemap_level_t *node = (jl_typemap_level_t*)ml;
if (node->targ.values != (void *)jl_nothing)
jl_typemap_rehash_array(&node->targ, ml, 1, offs);
if (node->arg1.values != (void *)jl_nothing)
jl_typemap_rehash_array(&node->arg1, ml, 0, offs);
jl_typemap_rehash(node->any, offs + 1);
}
}
static jl_typemap_t **mtcache_hash_bp(struct jl_ordereddict_t *pa JL_PROPAGATES_ROOT, jl_value_t *ty,
int8_t tparam, int8_t offs, jl_value_t *parent)
{
if (jl_is_datatype(ty)) {
uintptr_t uid = ((jl_datatype_t*)ty)->uid;
if (!uid || jl_is_kind(ty) || jl_has_free_typevars(ty))
// be careful not to put non-leaf types or DataType/UnionAll in the cache here,
// since they should have a lower priority and need to go into the sorted list
return NULL;
if (pa->values == (void*)jl_nothing) {
pa->indices = jl_alloc_int_1d(0, INIT_CACHE_SIZE);
jl_gc_wb(parent, pa->indices);
pa->values = jl_alloc_vec_any(0);
jl_gc_wb(parent, pa->values);
}
while (1) {
size_t slot = uid & (pa->indices->nrows - 1);
size_t idx = jl_intref(pa->indices, slot);
if (idx == 0) {
jl_array_ptr_1d_push(pa->values, jl_nothing);
idx = jl_array_len(pa->values);
if (idx > jl_max_int(pa->indices))
mtcache_rehash(pa, jl_array_len(pa->indices), parent, tparam, offs);
jl_intset(pa->indices, slot, idx);
return &((jl_typemap_t **)jl_array_ptr_data(pa->values))[idx - 1];
}
jl_typemap_t **pml = &((jl_typemap_t **)jl_array_ptr_data(pa->values))[idx - 1];
if (*pml == jl_nothing)
return pml;
jl_value_t *t;
if (jl_typeof(*pml) == (jl_value_t*)jl_typemap_level_type) {
t = ((jl_typemap_level_t*)*pml)->key;
}
else {
t = jl_field_type(jl_unwrap_unionall(
jl_typemap_entry_sig(*pml)),
offs);
if (tparam)
t = jl_tparam0(t);
}
if (t == ty)
return pml;
mtcache_rehash(pa, jl_array_len(pa->indices) * 2, parent, tparam, offs);
}
}
return NULL;
}
// ----- Sorted Type Signature Lookup Matching ----- //
static int jl_typemap_array_visitor(struct jl_ordereddict_t *a, jl_typemap_visitor_fptr fptr, void *closure)
{
size_t i, l = jl_array_len(a->values);
jl_typemap_t **data = (jl_typemap_t **)jl_array_ptr_data(a->values);
for(i=0; i < l; i++) {
if (!jl_typemap_visitor(data[i], fptr, closure))
return 0;
}
return 1;
}
// calls fptr on each jl_typemap_entry_t in cache in sort order, until fptr return false
static int jl_typemap_node_visitor(jl_typemap_entry_t *ml, jl_typemap_visitor_fptr fptr, void *closure)
{
while (ml != (void*)jl_nothing) {
if (!fptr(ml, closure))
return 0;
ml = ml->next;
}
return 1;
}
int jl_typemap_visitor(jl_typemap_t *cache, jl_typemap_visitor_fptr fptr, void *closure)
{
if (jl_typeof(cache) == (jl_value_t*)jl_typemap_level_type) {
jl_typemap_level_t *node = (jl_typemap_level_t*)cache;
if (node->targ.values != (void*)jl_nothing)
if (!jl_typemap_array_visitor(&node->targ, fptr, closure))
return 0;
if (node->arg1.values != (void*)jl_nothing)
if (!jl_typemap_array_visitor(&node->arg1, fptr, closure))
return 0;
if (!jl_typemap_node_visitor(node->linear, fptr, closure))
return 0;
return jl_typemap_visitor(node->any, fptr, closure);
}
else {
return jl_typemap_node_visitor((jl_typemap_entry_t*)cache, fptr, closure);
}
}
// predicate to fast-test if this type is a leaf type that can exist in the cache
// and does not need a more expensive linear scan to find all intersections
int is_cache_leaf(jl_value_t *ty)
{
return (jl_is_datatype(ty) && ((jl_datatype_t*)ty)->uid != 0 && !jl_is_kind(ty));
}
static int jl_typemap_intersection_array_visitor(struct jl_ordereddict_t *a, jl_value_t *ty, int tparam,
int offs, struct typemap_intersection_env *closure)
{
size_t i, l = jl_array_len(a->values);
jl_typemap_t **data = (jl_typemap_t **)jl_array_ptr_data(a->values);
for (i = 0; i < l; i++) {
jl_typemap_t *ml = data[i];
if (ml == jl_nothing)
continue;
jl_value_t *t;
if (jl_typeof(ml) == (jl_value_t *)jl_typemap_level_type) {
t = ((jl_typemap_level_t*)ml)->key;
}
else {
t = jl_field_type(jl_unwrap_unionall(jl_typemap_entry_sig(ml)), offs);
if (tparam)
t = jl_tparam0(t);
}
// `t` is a leaftype, so intersection test becomes subtype
if (ty == (jl_value_t*)jl_any_type || // easy case: Any always matches
(tparam
? (jl_typeof(t) == ty || jl_isa(t, ty)) // (Type{t} <: ty), where is_leaf_type(t) => isa(t, ty)
: (t == ty || jl_subtype(t, ty)))) {
if (!jl_typemap_intersection_visitor(ml, offs + 1, closure))
return 0;
}
}
return 1;
}
// calls fptr on each jl_typemap_entry_t in cache in sort order
// for which type ∩ ml->type != Union{}, until fptr return false
static int jl_typemap_intersection_node_visitor(jl_typemap_entry_t *ml, struct typemap_intersection_env *closure)
{
// slow-path scan everything in ml
// mark this `register` because (for branch prediction)
// that can be absolutely critical for speed
register jl_typemap_intersection_visitor_fptr fptr = closure->fptr;
while (ml != (void*)jl_nothing) {
if (closure->type == (jl_value_t*)ml->sig) {
// fast-path for the intersection of a type with itself
if (closure->env) {
closure->env = jl_outer_unionall_vars((jl_value_t*)ml->sig);
}
closure->ti = closure->type;
closure->issubty = 1;
if (!fptr(ml, closure))
return 0;
}
else {
jl_value_t *ti;
if (closure->env) {
closure->env = jl_emptysvec;
ti = jl_type_intersection_env_s(closure->type, (jl_value_t*)ml->sig, &closure->env, &closure->issubty);
}
else {
ti = jl_type_intersection(closure->type, (jl_value_t*)ml->sig);
}
if (ti != (jl_value_t*)jl_bottom_type) {
closure->ti = ti;
if (!fptr(ml, closure))
return 0;
}
}
ml = ml->next;
}
return 1;
}
int jl_typemap_intersection_visitor(jl_typemap_t *map, int offs,
struct typemap_intersection_env *closure)
{
if (jl_typeof(map) == (jl_value_t *)jl_typemap_level_type) {
jl_typemap_level_t *cache = (jl_typemap_level_t*)map;
jl_value_t *ty = NULL;
jl_value_t *ttypes = jl_unwrap_unionall(closure->type);
assert(jl_is_datatype(ttypes));
size_t l = jl_field_count(ttypes);
if (closure->va && l <= offs + 1) {
ty = closure->va;
}
else if (l > offs) {
ty = jl_tparam(ttypes, offs);
}
if (ty) {
while (jl_is_typevar(ty))
ty = ((jl_tvar_t*)ty)->ub;
// approxify the tparam until we have a valid type
if (jl_has_free_typevars(ty)) {
ty = jl_unwrap_unionall(ty);
if (jl_is_datatype(ty))
ty = ((jl_datatype_t*)ty)->name->wrapper;
else
ty = (jl_value_t*)jl_any_type;
}
if (cache->targ.values != (void*)jl_nothing) {
jl_value_t *typetype = jl_is_type_type(ty) ? jl_tparam0(ty) : NULL;
if (typetype) {
if (is_cache_leaf(typetype)) {
// direct lookup of leaf types
jl_typemap_t *ml = mtcache_hash_lookup(&cache->targ, typetype, 1, offs);
if (ml != jl_nothing) {
if (!jl_typemap_intersection_visitor(ml, offs+1, closure)) return 0;
}
}
}
else {
// else an array scan is required to check subtypes
// first, fast-path: optimized pre-intersection test to see if `ty` could intersect with any Type
if (typetype || !jl_has_empty_intersection((jl_value_t*)jl_type_type, ty))
if (!jl_typemap_intersection_array_visitor(&cache->targ, ty, 1, offs, closure)) return 0;
}
}
if (cache->arg1.values != (void*)jl_nothing) {
if (is_cache_leaf(ty)) {
// direct lookup of leaf types
jl_typemap_t *ml = mtcache_hash_lookup(&cache->arg1, ty, 0, offs);
if (ml != jl_nothing) {
if (!jl_typemap_intersection_visitor(ml, offs+1, closure)) return 0;
}
}
else {
// else an array scan is required to check subtypes
if (!jl_typemap_intersection_array_visitor(&cache->arg1, ty, 0, offs, closure)) return 0;
}
}
}
if (!jl_typemap_intersection_node_visitor(cache->linear, closure))
return 0;
return jl_typemap_intersection_visitor(cache->any, offs+1, closure);
}
else {
return jl_typemap_intersection_node_visitor(
(jl_typemap_entry_t*)map, closure);
}
}
/*
Method caches are divided into three parts: one for signatures where
the first argument is a singleton kind (Type{Foo}), one indexed by the
UID of the first argument's type in normal cases, and a fallback
table of everything else.
Note that the "primary key" is the type of the first *argument*, since
there tends to be lots of variation there. The type of the 0th argument
(the function) is always the same for most functions.
*/
static jl_typemap_entry_t *jl_typemap_assoc_by_type_(jl_typemap_entry_t *ml, jl_value_t *types,
jl_svec_t **penv, size_t world, size_t max_world_mask)
{
jl_value_t *unw = jl_unwrap_unionall((jl_value_t*)types);
int isua = jl_is_unionall(types);
size_t n = jl_field_count(unw);
int typesisva = n == 0 ? 0 : jl_is_vararg_type(jl_tparam(unw, n-1));
for (; ml != (void*)jl_nothing; ml = ml->next) {
if (world < ml->min_world || world > (ml->max_world | max_world_mask))
continue; // ignore replaced methods
size_t lensig = jl_field_count(jl_unwrap_unionall((jl_value_t*)ml->sig));
if (lensig == n || (ml->va && lensig <= n+1)) {
int resetenv = 0, ismatch = 1;
if (ml->simplesig != (void*)jl_nothing && !isua) {
size_t lensimplesig = jl_field_count(ml->simplesig);
int isva = lensimplesig > 0 && jl_is_vararg_type(jl_tparam(ml->simplesig, lensimplesig - 1));
if (lensig == n || (isva && lensimplesig <= n + 1))
ismatch = sig_match_by_type_simple(jl_svec_data(((jl_datatype_t*)types)->parameters), n,
ml->simplesig, lensimplesig, isva);
else
ismatch = 0;
}
if (ismatch == 0)
; // nothing
else if (ml->isleafsig && !typesisva && !isua)
ismatch = sig_match_by_type_leaf(jl_svec_data(((jl_datatype_t*)types)->parameters),
ml->sig, lensig);
else if (ml->issimplesig && !typesisva && !isua)
ismatch = sig_match_by_type_simple(jl_svec_data(((jl_datatype_t*)types)->parameters), n,
ml->sig, lensig, ml->va);
else {
ismatch = jl_subtype_matching(types, (jl_value_t*)ml->sig, penv);
if (ismatch && penv)
resetenv = 1;
}
if (ismatch) {
size_t i, l;
for (i = 0, l = jl_svec_len(ml->guardsigs); i < l; i++) {
// see corresponding code in jl_typemap_entry_assoc_exact
if (jl_subtype(types, jl_svecref(ml->guardsigs, i))) {
ismatch = 0;
break;
}
}
if (ismatch)
return ml;
}
if (resetenv)
*penv = jl_emptysvec;
}
}
return NULL;
}
int jl_obviously_unequal(jl_value_t *a, jl_value_t *b);
static jl_typemap_entry_t *jl_typemap_lookup_by_type_(jl_typemap_entry_t *ml, jl_value_t *types,
size_t world, size_t max_world_mask)
{
for (; ml != (void*)jl_nothing; ml = ml->next) {
if (world < ml->min_world || world > (ml->max_world | max_world_mask))
continue;
// unroll the first few cases here, to the extent that is possible to do fast and easily
jl_value_t *a = jl_unwrap_unionall(types);
jl_value_t *b = jl_unwrap_unionall((jl_value_t*)ml->sig);
size_t na = jl_nparams(a);
size_t nb = jl_nparams(b);
int va_a = na > 0 && jl_is_vararg_type(jl_tparam(a, na - 1));
int va_b = nb > 0 && jl_is_vararg_type(jl_tparam(b, nb - 1));
if (!va_a && !va_b) {
if (na != nb)
continue;
}
if (na - va_a > 0 && nb - va_b > 0) {
if (jl_obviously_unequal(jl_tparam(a, 0), jl_tparam(b, 0)))
continue;
if (na - va_a > 1 && nb - va_b > 1) {
if (jl_obviously_unequal(jl_tparam(a, 1), jl_tparam(b, 1)))
continue;
if (na - va_a > 2 && nb - va_b > 2) {
if (jl_obviously_unequal(jl_tparam(a, 2), jl_tparam(b, 2)))
continue;
}
}
}
if (jl_types_equal((jl_value_t*)types, (jl_value_t*)ml->sig))
return ml;
}
return NULL;
}
// this is the general entry point for looking up a type in the cache
// as a subtype, or with type_equal
jl_typemap_entry_t *jl_typemap_assoc_by_type(jl_typemap_t *ml_or_cache, jl_value_t *types, jl_svec_t **penv,
int8_t subtype, int8_t offs, size_t world, size_t max_world_mask)
{
if (jl_typeof(ml_or_cache) == (jl_value_t *)jl_typemap_level_type) {
jl_typemap_level_t *cache = (jl_typemap_level_t*)ml_or_cache;
// called object is the primary key for constructors, otherwise first argument
jl_value_t *ty = NULL;
jl_value_t *ttypes = jl_unwrap_unionall((jl_value_t*)types);
assert(jl_is_datatype(ttypes));
size_t l = jl_field_count(ttypes);
int isva = 0;
// compute the type at offset `offs` into `types`, which may be a Vararg
if (l <= offs + 1) {
ty = jl_tparam(ttypes, l - 1);
if (jl_is_vararg_type(ty)) {
ty = jl_unwrap_vararg(ty);
isva = 1;
}
else if (l <= offs) {
ty = NULL;
}
}
else if (l > offs) {
ty = jl_tparam(ttypes, offs);
}
// If there is a type at offs, look in the optimized caches
if (!subtype) {
if (ty && jl_is_any(ty))
return jl_typemap_assoc_by_type(cache->any, types, penv, subtype, offs + 1, world, max_world_mask);
if (isva) // in lookup mode, want to match Vararg exactly, not as a subtype
ty = NULL;
}
if (ty) {
if (jl_is_type_type(ty)) {
jl_value_t *a0 = jl_tparam0(ty);
if (cache->targ.values != (void*)jl_nothing && jl_is_datatype(a0)) {
jl_typemap_t *ml = mtcache_hash_lookup(&cache->targ, a0, 1, offs);
if (ml != jl_nothing) {
jl_typemap_entry_t *li =
jl_typemap_assoc_by_type(ml, types, penv, subtype, offs + 1, world, max_world_mask);
if (li) return li;
}
}
if (!subtype && is_cache_leaf(a0)) return NULL;
}
if (cache->arg1.values != (void*)jl_nothing && jl_is_datatype(ty)) {
jl_typemap_t *ml = mtcache_hash_lookup(&cache->arg1, ty, 0, offs);
if (ml != jl_nothing) {
jl_typemap_entry_t *li =
jl_typemap_assoc_by_type(ml, types, penv, subtype, offs + 1, world, max_world_mask);
if (li) return li;
}
}
if (!subtype && is_cache_leaf(ty)) return NULL;
}
// Always check the list (since offs doesn't always start at 0)
if (subtype) {
jl_typemap_entry_t *li = jl_typemap_assoc_by_type_(cache->linear, types, penv, world, max_world_mask);
if (li) return li;
return jl_typemap_assoc_by_type(cache->any, types, penv, subtype, offs + 1, world, max_world_mask);
}
else {
return jl_typemap_lookup_by_type_(cache->linear, types, world, max_world_mask);
}
}
else {
jl_typemap_entry_t *leaf = (jl_typemap_entry_t*)ml_or_cache;
return subtype ?
jl_typemap_assoc_by_type_(leaf, types, penv, world, max_world_mask) :
jl_typemap_lookup_by_type_(leaf, types, world, max_world_mask);
}
}
jl_typemap_entry_t *jl_typemap_entry_assoc_exact(jl_typemap_entry_t *ml, jl_value_t **args, size_t n, size_t world)
{
// some manually-unrolled common special cases
while (ml->simplesig == (void*)jl_nothing && ml->guardsigs == jl_emptysvec && ml->isleafsig) {
// use a tight loop for as long as possible
if (world >= ml->min_world && world <= ml->max_world) {
if (n == jl_field_count(ml->sig) && jl_typeof(args[0]) == jl_tparam(ml->sig, 0)) {
if (n == 1)
return ml;
if (n == 2) {
if (jl_typeof(args[1]) == jl_tparam(ml->sig, 1))
return ml;
}
else if (n == 3) {
if (jl_typeof(args[1]) == jl_tparam(ml->sig, 1) &&
jl_typeof(args[2]) == jl_tparam(ml->sig, 2))
return ml;
}
else {
if (sig_match_leaf(args, jl_svec_data(ml->sig->parameters), n))
return ml;
}
}
}
ml = ml->next;
if (ml == (void*)jl_nothing)
return NULL;
}
for (; ml != (void*)jl_nothing; ml = ml->next) {
if (world < ml->min_world || world > ml->max_world)
continue; // ignore replaced methods
size_t lensig = jl_field_count(ml->sig);
if (lensig == n || (ml->va && lensig <= n+1)) {
if (ml->simplesig != (void*)jl_nothing) {
size_t lensimplesig = jl_field_count(ml->simplesig);
int isva = lensimplesig > 0 && jl_is_vararg_type(jl_tparam(ml->simplesig, lensimplesig - 1));
if (lensig == n || (isva && lensimplesig <= n + 1)) {
if (!sig_match_simple(args, n, jl_svec_data(ml->simplesig->parameters), isva, lensimplesig))
continue;
}
else {
continue;
}
}
if (ml->isleafsig) {
if (!sig_match_leaf(args, jl_svec_data(ml->sig->parameters), n))
continue;
}
else if (ml->issimplesig) {
if (!sig_match_simple(args, n, jl_svec_data(ml->sig->parameters), ml->va, lensig))
continue;
}
else {
if (!jl_tuple_isa(args, n, ml->sig))
continue;
}
size_t i, l;
if (ml->guardsigs != jl_emptysvec) {
for (i = 0, l = jl_svec_len(ml->guardsigs); i < l; i++) {
// checking guard entries require a more
// expensive subtype check, since guard entries added for @nospecialize might be
// abstract. this fixed issue #12967.
if (jl_tuple_isa(args, n, (jl_tupletype_t*)jl_svecref(ml->guardsigs, i))) {
goto nomatch;
}
}
}
return ml;
nomatch:
continue;
}
}
return NULL;
}
jl_typemap_entry_t *jl_typemap_level_assoc_exact(jl_typemap_level_t *cache, jl_value_t **args, size_t n, int8_t offs, size_t world)
{
if (n > offs) {
jl_value_t *a1 = args[offs];
jl_value_t *ty = (jl_value_t*)jl_typeof(a1);
assert(jl_is_datatype(ty));
if (ty == (jl_value_t*)jl_datatype_type && cache->targ.values != (void*)jl_nothing) {
jl_typemap_t *ml_or_cache = mtcache_hash_lookup(&cache->targ, a1, 1, offs);
jl_typemap_entry_t *ml = jl_typemap_assoc_exact(ml_or_cache, args, n, offs+1, world);
if (ml) return ml;
}
if (cache->arg1.values != (void*)jl_nothing) {
jl_typemap_t *ml_or_cache = mtcache_hash_lookup(&cache->arg1, ty, 0, offs);
jl_typemap_entry_t *ml = jl_typemap_assoc_exact(ml_or_cache, args, n, offs+1, world);
if (ml) return ml;
}
}
if (cache->linear != (jl_typemap_entry_t*)jl_nothing) {
jl_typemap_entry_t *ml = jl_typemap_entry_assoc_exact(cache->linear, args, n, world);
if (ml) return ml;
}
if (cache->any != jl_nothing)
return jl_typemap_assoc_exact(cache->any, args, n, offs+1, world);
return NULL;
}
// ----- Method List Insertion Management ----- //
static unsigned jl_typemap_list_count(jl_typemap_entry_t *ml) JL_NOTSAFEPOINT
{
unsigned count = 0;
while (ml != (void*)jl_nothing) {
count++;
ml = ml->next;
}
return count;
}
static void jl_typemap_level_insert_(jl_typemap_level_t *cache, jl_typemap_entry_t *newrec, int8_t offs, const struct jl_typemap_info *tparams);
static void jl_typemap_list_insert_sorted(jl_typemap_entry_t **pml, jl_value_t *parent,
jl_typemap_entry_t *newrec, const struct jl_typemap_info *tparams);
static jl_typemap_level_t *jl_new_typemap_level(void)
{
jl_ptls_t ptls = jl_get_ptls_states();
jl_typemap_level_t *cache =
(jl_typemap_level_t*)jl_gc_alloc(ptls, sizeof(jl_typemap_level_t),
jl_typemap_level_type);
cache->key = NULL;
cache->linear = (jl_typemap_entry_t*)jl_nothing;
cache->any = jl_nothing;
cache->targ.indices = (jl_array_t*)jl_nothing;
cache->targ.values = (jl_array_t*)jl_nothing;
cache->arg1.indices = (jl_array_t*)jl_nothing;
cache->arg1.values = (jl_array_t*)jl_nothing;
return cache;
}
static jl_typemap_level_t *jl_method_convert_list_to_cache(jl_typemap_entry_t *ml, jl_value_t *key, int8_t offs,
const struct jl_typemap_info *tparams)
{
jl_typemap_level_t *cache = jl_new_typemap_level();
cache->key = key;
jl_typemap_entry_t *next = NULL;
JL_GC_PUSH3(&cache, &next, &ml);
while (ml != (void*)jl_nothing) {
next = ml->next;
ml->next = (jl_typemap_entry_t*)jl_nothing;
jl_typemap_level_insert_(cache, ml, offs, tparams);
ml = next;
}
JL_GC_POP();
return cache;
}
static void jl_typemap_list_insert_(jl_typemap_entry_t **pml, jl_value_t *parent,
jl_typemap_entry_t *newrec, const struct jl_typemap_info *tparams)
{
if (*pml == (void*)jl_nothing || newrec->isleafsig || (tparams && tparams->unsorted)) {
newrec->next = *pml;
jl_gc_wb(newrec, newrec->next);
*pml = newrec;
jl_gc_wb(parent, newrec);
}
else {
jl_typemap_list_insert_sorted(pml, parent, newrec, tparams);
}
}
static void jl_typemap_insert_generic(jl_typemap_t **pml, jl_value_t *parent,
jl_typemap_entry_t *newrec, jl_value_t *key, int8_t offs,
const struct jl_typemap_info *tparams)
{
if (jl_typeof(*pml) == (jl_value_t*)jl_typemap_level_type) {
jl_typemap_level_insert_((jl_typemap_level_t*)*pml, newrec, offs, tparams);
return;
}
unsigned count = jl_typemap_list_count((jl_typemap_entry_t*)*pml);
if (count > MAX_METHLIST_COUNT) {
*pml = (jl_typemap_t*)jl_method_convert_list_to_cache(
(jl_typemap_entry_t *)*pml,
key, offs, tparams);
jl_gc_wb(parent, *pml);
jl_typemap_level_insert_((jl_typemap_level_t*)*pml, newrec, offs, tparams);
return;
}
jl_typemap_list_insert_((jl_typemap_entry_t **)pml,
parent, newrec, tparams);
}
static int jl_typemap_array_insert_(struct jl_ordereddict_t *cache, jl_value_t *key, jl_typemap_entry_t *newrec,
jl_value_t *parent, int8_t tparam, int8_t offs,
const struct jl_typemap_info *tparams)
{
jl_typemap_t **pml = mtcache_hash_bp(cache, key, tparam, offs, (jl_value_t*)parent);
if (pml)
jl_typemap_insert_generic(pml, (jl_value_t*)cache->values, newrec, key, offs+1, tparams);
return pml != NULL;
}
static void jl_typemap_level_insert_(jl_typemap_level_t *cache, jl_typemap_entry_t *newrec, int8_t offs,
const struct jl_typemap_info *tparams)
{
jl_value_t *ttypes = jl_unwrap_unionall((jl_value_t*)newrec->sig);
size_t l = jl_field_count(ttypes);
// compute the type at offset `offs` into `sig`, which may be a Vararg
jl_value_t *t1 = NULL;
int isva = 0;
if (l <= offs + 1) {
t1 = jl_tparam(ttypes, l - 1);
if (jl_is_vararg_type(t1)) {
isva = 1;
t1 = jl_unwrap_vararg(t1);
}
else if (l <= offs) {
t1 = NULL;
}
}
else if (l > offs) {
t1 = jl_tparam(ttypes, offs);
}
// If the type at `offs` is Any, put it in the Any list
if (t1 && jl_is_any(t1)) {
jl_typemap_insert_generic(&cache->any, (jl_value_t*)cache, newrec, (jl_value_t*)jl_any_type, offs+1, tparams);
return;
}
// Don't put Varargs in the optimized caches (too hard to handle in lookup and bp)
if (t1 && !isva) {
// if t1 != jl_typetype_type and the argument is Type{...}, this
// method has specializations for singleton kinds and we use
// the table indexed for that purpose.
if (t1 != (jl_value_t*)jl_typetype_type && jl_is_type_type(t1)) {
jl_value_t *a0 = jl_tparam0(t1);
if (jl_typemap_array_insert_(&cache->targ, a0, newrec, (jl_value_t*)cache, 1, offs, tparams))
return;
}
if (jl_typemap_array_insert_(&cache->arg1, t1, newrec, (jl_value_t*)cache, 0, offs, tparams))
return;
}
jl_typemap_list_insert_(&cache->linear, (jl_value_t*)cache, newrec, tparams);
}
jl_typemap_entry_t *jl_typemap_insert(jl_typemap_t **cache, jl_value_t *parent,
jl_tupletype_t *type,
jl_tupletype_t *simpletype, jl_svec_t *guardsigs,
jl_value_t *newvalue, int8_t offs,
const struct jl_typemap_info *tparams,
size_t min_world, size_t max_world,
jl_value_t **overwritten)
{
jl_ptls_t ptls = jl_get_ptls_states();
assert(min_world > 0 && max_world > 0);
if (!simpletype)
simpletype = (jl_tupletype_t*)jl_nothing;
jl_value_t *ttype = jl_unwrap_unionall((jl_value_t*)type);
if ((jl_value_t*)simpletype == jl_nothing) {
jl_typemap_entry_t *ml = jl_typemap_assoc_by_type(*cache, (jl_value_t*)type, NULL, 0, offs, min_world, 0);
if (ml && ml->simplesig == (void*)jl_nothing) {
if (overwritten != NULL)
*overwritten = ml->func.value;
if (newvalue == ml->func.value) // no change. TODO: involve world in computation!
return ml;
if (newvalue == NULL) // don't overwrite with guard entries
return ml;
ml->max_world = min_world - 1;
}
}
jl_typemap_entry_t *newrec =
(jl_typemap_entry_t*)jl_gc_alloc(ptls, sizeof(jl_typemap_entry_t),
jl_typemap_entry_type);
newrec->sig = type;
newrec->simplesig = simpletype;
newrec->func.value = newvalue;
newrec->guardsigs = guardsigs;
newrec->next = (jl_typemap_entry_t*)jl_nothing;
newrec->min_world = min_world;
newrec->max_world = max_world;
// compute the complexity of this type signature
newrec->va = jl_is_va_tuple((jl_datatype_t*)ttype);
newrec->issimplesig = !jl_is_unionall(type); // a TypeVar environment needs a complex matching test
newrec->isleafsig = newrec->issimplesig && !newrec->va; // entirely leaf types don't need to be sorted
JL_GC_PUSH1(&newrec);
assert(jl_is_tuple_type(ttype));
size_t i, l;
for (i = 0, l = jl_field_count(ttype); i < l && newrec->issimplesig; i++) {
jl_value_t *decl = jl_field_type(ttype, i);
if (jl_is_kind(decl))
newrec->isleafsig = 0; // Type{} may have a higher priority than a kind
else if (jl_is_type_type(decl))
newrec->isleafsig = 0; // Type{} may need special processing to compute the match
else if (jl_is_vararg_type(decl))
newrec->isleafsig = 0; // makes iteration easier when the endpoints are the same
else if (decl == (jl_value_t*)jl_any_type)
newrec->isleafsig = 0; // Any needs to go in the general cache
else if (!jl_is_concrete_type(decl)) // anything else needs to go through the general subtyping test
newrec->isleafsig = newrec->issimplesig = 0;
}
// TODO: assert that guardsigs == jl_emptysvec && simplesig == jl_nothing if isleafsig and optimize with that knowledge?
jl_typemap_insert_generic(cache, parent, newrec, NULL, offs, tparams);
JL_GC_POP();
return newrec;
}
static int has_unions(jl_value_t *type)
{
type = jl_unwrap_unionall(type);
int i;
for (i = 0; i < jl_nparams(type); i++) {
jl_value_t *t = jl_tparam(type, i);
if (jl_is_uniontype(t) ||
(jl_is_vararg_type(t) && jl_is_uniontype(jl_unwrap_vararg(t))))
return 1;
}
return 0;
}
static void jl_typemap_list_insert_sorted(jl_typemap_entry_t **pml, jl_value_t *parent,
jl_typemap_entry_t *newrec,
const struct jl_typemap_info *tparams)
{
jl_typemap_entry_t *l, **pl;
pl = pml;
l = *pml;
jl_value_t *pa = parent;
while (l != (void*)jl_nothing) {
if (!l->isleafsig) { // quickly ignore all of the leafsig entries (these were handled by caller)
if (jl_type_morespecific((jl_value_t*)newrec->sig, (jl_value_t*)l->sig)) {
if (l->simplesig == (void*)jl_nothing ||
newrec->simplesig != (void*)jl_nothing || !jl_types_equal((jl_value_t*)l->sig, (jl_value_t*)newrec->sig)) {
// might need to insert multiple entries for a lookup differing only by their simplesig
// when simplesig contains a kind
// TODO: make this test more correct or figure out a better way to compute this
break;
}
}
}
pl = &l->next;
pa = (jl_value_t*)l;
l = l->next;
}
JL_SIGATOMIC_BEGIN();
newrec->next = l;
jl_gc_wb(newrec, l);
*pl = newrec;
jl_gc_wb(pa, newrec);
// if this contains Union types, methods after it might actually be
// more specific than it. we need to re-sort them.
if (has_unions((jl_value_t*)newrec->sig)) {
jl_value_t *item_parent = (jl_value_t*)newrec;
jl_value_t *next_parent = 0;
jl_typemap_entry_t *item = newrec->next, *next;
jl_typemap_entry_t **pitem = &newrec->next, **pnext;
while (item != (void*)jl_nothing) {
pl = pml;
l = *pml;
pa = parent;
next = item->next;
pnext = &item->next;
next_parent = (jl_value_t*)item;
while (l != newrec->next) {
if (jl_type_morespecific((jl_value_t*)item->sig, (jl_value_t*)l->sig)) {
// reinsert item earlier in the list
*pitem = next;
jl_gc_wb(item_parent, next);
item->next = l;
jl_gc_wb(item, item->next);
*pl = item;
jl_gc_wb(pa, item);
pnext = pitem;
next_parent = item_parent;
break;
}
pl = &l->next;
pa = (jl_value_t*)l;
l = l->next;
}
item = next;
pitem = pnext;
item_parent = next_parent;
}
}
JL_SIGATOMIC_END();
return;
}
#ifdef __cplusplus
}
#endif
