decf8e6a8b
The STATIC macro was introduced a very long time ago in commit
d5df6cd44a. The original reason for this was
to have the option to define it to nothing so that all static functions
become global functions and therefore visible to certain debug tools, so
one could do function size comparison and other things.
This STATIC feature is rarely (if ever) used. And with the use of LTO and
heavy inline optimisation, analysing the size of individual functions when
they are not static is not a good representation of the size of code when
fully optimised.
So the macro does not have much use and it's simpler to just remove it.
Then you know exactly what it's doing. For example, newcomers don't have
to learn what the STATIC macro is and why it exists. Reading the code is
also less "loud" with a lowercase static.
One other minor point in favour of removing it, is that it stops bugs with
`STATIC inline`, which should always be `static inline`.
Methodology for this commit was:
1) git ls-files | egrep '\.[ch]$' | \
xargs sed -Ei "s/(^| )STATIC($| )/\1static\2/"
2) Do some manual cleanup in the diff by searching for the word STATIC in
comments and changing those back.
3) "git-grep STATIC docs/", manually fixed those cases.
4) "rg -t python STATIC", manually fixed codegen lines that used STATIC.
This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/*
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* This file is part of the MicroPython 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) 2015 Daniel Campora
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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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#include <stdint.h>
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#include <stdbool.h>
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#include "py/obj.h"
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#include "inc/hw_types.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_memmap.h"
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#include "rom_map.h"
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#include "pybrtc.h"
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#include "simplelink.h"
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#include "modnetwork.h"
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#include "modwlan.h"
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#include "random.h"
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#include "debug.h"
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/******************************************************************************
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* LOCAL TYPES
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******************************************************************************/
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typedef union _rng_id_t {
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uint32_t id32;
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uint16_t id16[3];
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uint8_t id8[6];
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} rng_id_t;
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/******************************************************************************
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* LOCAL VARIABLES
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******************************************************************************/
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static uint32_t s_seed;
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/******************************************************************************
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* LOCAL FUNCTION DECLARATIONS
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******************************************************************************/
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static uint32_t lfsr (uint32_t input);
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/******************************************************************************
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* PRIVATE FUNCTIONS
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******************************************************************************/
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static uint32_t lfsr (uint32_t input) {
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assert( input != 0 );
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return (input >> 1) ^ (-(input & 0x01) & 0x00E10000);
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}
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/******************************************************************************/
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// MicroPython bindings;
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static mp_obj_t machine_rng_get(void) {
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return mp_obj_new_int(rng_get());
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}
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MP_DEFINE_CONST_FUN_OBJ_0(machine_rng_get_obj, machine_rng_get);
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/******************************************************************************
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* PUBLIC FUNCTIONS
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******************************************************************************/
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void rng_init0 (void) {
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rng_id_t juggler;
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uint32_t seconds;
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uint16_t mseconds;
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// get the seconds and the milliseconds from the RTC
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pyb_rtc_get_time(&seconds, &mseconds);
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wlan_get_mac (juggler.id8);
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// flatten the 48-bit board identification to 24 bits
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juggler.id16[0] ^= juggler.id16[2];
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juggler.id8[0] ^= juggler.id8[3];
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juggler.id8[1] ^= juggler.id8[4];
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juggler.id8[2] ^= juggler.id8[5];
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s_seed = juggler.id32 & 0x00FFFFFF;
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s_seed += (seconds & 0x000FFFFF) + mseconds;
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// the seed must not be zero
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if (s_seed == 0) {
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s_seed = 1;
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}
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}
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uint32_t rng_get (void) {
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s_seed = lfsr( s_seed );
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return s_seed;
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}
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