25개 이상의 토픽을 선택하실 수 없습니다.
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93 lines
1.9 KiB
93 lines
1.9 KiB
// This file is part of Jiffy released under the MIT license.
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// See the LICENSE file for more information.
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#include "jiffy.h"
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ERL_NIF_TERM
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make_atom(ErlNifEnv* env, const char* name)
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{
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ERL_NIF_TERM ret;
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if(enif_make_existing_atom(env, name, &ret, ERL_NIF_LATIN1)) {
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return ret;
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}
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return enif_make_atom(env, name);
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}
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ERL_NIF_TERM
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make_ok(jiffy_st* st, ErlNifEnv* env, ERL_NIF_TERM value)
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{
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return enif_make_tuple2(env, st->atom_ok, value);
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}
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ERL_NIF_TERM
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make_error(jiffy_st* st, ErlNifEnv* env, const char* error)
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{
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return enif_make_tuple2(env, st->atom_error, make_atom(env, error));
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}
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ERL_NIF_TERM
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make_obj_error(jiffy_st* st, ErlNifEnv* env,
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const char* error, ERL_NIF_TERM obj)
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{
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ERL_NIF_TERM reason = enif_make_tuple2(env, make_atom(env, error), obj);
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return enif_make_tuple2(env, st->atom_error, reason);
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}
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int
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get_bytes_per_iter(ErlNifEnv* env, ERL_NIF_TERM val, size_t* bpi)
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{
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jiffy_st* st = (jiffy_st*) enif_priv_data(env);
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const ERL_NIF_TERM* tuple;
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int arity;
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unsigned int bytes;
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if(!enif_get_tuple(env, val, &arity, &tuple)) {
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return 0;
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}
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if(arity != 2) {
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return 0;
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}
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if(enif_compare(tuple[0], st->atom_bytes_per_iter) != 0) {
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return 0;
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}
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if(!enif_get_uint(env, tuple[1], &bytes)) {
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return 0;
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}
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*bpi = (size_t) bytes;
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return 1;
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}
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int
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should_yield(size_t used, size_t limit)
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{
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if(limit == 0 || used < limit) {
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return 0;
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}
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return 1;
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}
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int
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consume_timeslice(ErlNifEnv* env, size_t used, size_t limit)
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{
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#if(ERL_NIF_MAJOR_VERSION >= 2 && ERL_NIF_MINOR_VERSION >= 4)
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double u = (double) used;
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double l = (double) limit;
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int perc = (int) (100.0 * (u / l));
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if(perc < 1) {
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perc = 1;
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} else if(perc > 100) {
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perc = 100;
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}
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return enif_consume_timeslice(env, perc);
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#else
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return 0;
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#endif
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}
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