1084b0f9c2
This saves a lot of RAM for 2 reasons: 1. For functions that don't have default values, var args or var kw args (which is a large number of functions in the general case), the mp_obj_fun_bc_t type now fits in 1 GC block (previously needed 2 because of the extra pointer to point to the arg_names array). So this saves 16 bytes per function (32 bytes on 64-bit machines). 2. Combining separate memory regions generally saves RAM because the unused bytes at the end of the GC block are saved for 1 of the blocks (since that block doesn't exist on its own anymore). So generally this saves 8 bytes per function. Tested by importing lots of modules: - 64-bit Linux gave about an 8% RAM saving for 86k of used RAM. - pyboard gave about a 6% RAM saving for 31k of used RAM.
44 lines
2.2 KiB
C
44 lines
2.2 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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typedef struct _mp_obj_fun_bc_t {
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mp_obj_base_t base;
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mp_obj_dict_t *globals; // the context within which this function was defined
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mp_uint_t n_pos_args : 8; // number of arguments this function takes
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mp_uint_t n_kwonly_args : 8; // number of keyword-only arguments this function takes
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mp_uint_t n_def_args : 8; // number of default arguments
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mp_uint_t has_def_kw_args : 1; // set if this function has default keyword args
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mp_uint_t takes_var_args : 1; // set if this function takes variable args
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mp_uint_t takes_kw_args : 1; // set if this function takes keyword args
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const byte *bytecode; // bytecode for the function
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// the following extra_args array is allocated space to take (in order):
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// - values of positional default args (if any)
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// - a single slot for default kw args dict (if it has them)
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// - a single slot for var args tuple (if it takes them)
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// - a single slot for kw args dict (if it takes them)
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mp_obj_t extra_args[];
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} mp_obj_fun_bc_t;
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