add circuitpython code

1 files changed, 310 insertions, 0 deletions

diff --git a/circuitpython/py/mpstate.h b/circuitpython/py/mpstate.h
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+++ b/circuitpython/py/mpstate.h
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+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_PY_MPSTATE_H
+#define MICROPY_INCLUDED_PY_MPSTATE_H
+
+#include <stdint.h>
+
+#include "py/mpconfig.h"
+#include "py/mpthread.h"
+#include "py/misc.h"
+#include "py/nlr.h"
+#include "py/obj.h"
+#include "py/objlist.h"
+#include "py/objexcept.h"
+
+// This file contains structures defining the state of the MicroPython
+// memory system, runtime and virtual machine.  The state is a global
+// variable, but in the future it is hoped that the state can become local.
+
+// This structure contains dynamic configuration for the compiler.
+#if MICROPY_DYNAMIC_COMPILER
+typedef struct mp_dynamic_compiler_t {
+    uint8_t small_int_bits; // must be <= host small_int_bits
+    bool py_builtins_str_unicode;
+    uint8_t native_arch;
+    uint8_t nlr_buf_num_regs;
+} mp_dynamic_compiler_t;
+extern mp_dynamic_compiler_t mp_dynamic_compiler;
+#endif
+
+// These are the values for sched_state
+#define MP_SCHED_IDLE (1)
+#define MP_SCHED_LOCKED (-1)
+#define MP_SCHED_PENDING (0) // 0 so it's a quick check in the VM
+
+typedef struct _mp_sched_item_t {
+    mp_obj_t func;
+    mp_obj_t arg;
+} mp_sched_item_t;
+
+// This structure hold information about the memory allocation system.
+typedef struct _mp_state_mem_t {
+    #if MICROPY_MEM_STATS
+    size_t total_bytes_allocated;
+    size_t current_bytes_allocated;
+    size_t peak_bytes_allocated;
+    #endif
+
+    byte *gc_alloc_table_start;
+    size_t gc_alloc_table_byte_len;
+    #if MICROPY_ENABLE_FINALISER
+    byte *gc_finaliser_table_start;
+    #endif
+    byte *gc_pool_start;
+    byte *gc_pool_end;
+
+    void *gc_lowest_long_lived_ptr;
+
+    int gc_stack_overflow;
+    MICROPY_GC_STACK_ENTRY_TYPE gc_stack[MICROPY_ALLOC_GC_STACK_SIZE];
+
+    // This variable controls auto garbage collection.  If set to false then the
+    // GC won't automatically run when gc_alloc can't find enough blocks.  But
+    // you can still allocate/free memory and also explicitly call gc_collect.
+    bool gc_auto_collect_enabled;
+
+    #if MICROPY_GC_ALLOC_THRESHOLD
+    size_t gc_alloc_amount;
+    size_t gc_alloc_threshold;
+    #endif
+
+    size_t gc_first_free_atb_index[MICROPY_ATB_INDICES];
+    size_t gc_last_free_atb_index;
+
+    #if MICROPY_PY_GC_COLLECT_RETVAL
+    size_t gc_collected;
+    #endif
+
+    #if MICROPY_PY_THREAD && !MICROPY_PY_THREAD_GIL
+    // This is a global mutex used to make the GC thread-safe.
+    mp_thread_mutex_t gc_mutex;
+    #endif
+
+    void **permanent_pointers;
+} mp_state_mem_t;
+
+// This structure hold runtime and VM information.  It includes a section
+// which contains root pointers that must be scanned by the GC.
+typedef struct _mp_state_vm_t {
+    //
+    // CONTINUE ROOT POINTER SECTION
+    // This must start at the start of this structure and follows
+    // the state in the mp_state_thread_t structure, continuing
+    // the root pointer section from there.
+    //
+
+    qstr_pool_t *last_pool;
+
+    // non-heap memory for creating a traceback if we can't allocate RAM
+    mp_obj_traceback_t mp_emergency_traceback_obj;
+
+    // non-heap memory for creating an exception if we can't allocate RAM
+    mp_obj_exception_t mp_emergency_exception_obj;
+
+    // memory for exception arguments if we can't allocate RAM
+    #if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF
+    #if MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE > 0
+    // statically allocated buf (needs to be aligned to mp_obj_t)
+    mp_obj_t mp_emergency_exception_buf[MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE / sizeof(mp_obj_t)];
+    #else
+    // dynamically allocated buf
+    byte *mp_emergency_exception_buf;
+    #endif
+    #endif
+
+    #if MICROPY_KBD_EXCEPTION
+    // exception object of type KeyboardInterrupt
+    mp_obj_exception_t mp_kbd_exception;
+    #endif
+
+    // exception object of type ReloadException
+    mp_obj_exception_t mp_reload_exception;
+
+    // dictionary with loaded modules (may be exposed as sys.modules)
+    mp_obj_dict_t mp_loaded_modules_dict;
+
+    #if MICROPY_ENABLE_SCHEDULER
+    mp_sched_item_t sched_queue[MICROPY_SCHEDULER_DEPTH];
+    #endif
+
+    // current exception being handled, for sys.exc_info()
+    #if MICROPY_PY_SYS_EXC_INFO
+    mp_obj_base_t *cur_exception;
+    #endif
+
+    #if MICROPY_PY_SYS_ATEXIT
+    // exposed through sys.atexit function
+    mp_obj_t sys_exitfunc;
+    #endif
+
+    // dictionary for the __main__ module
+    mp_obj_dict_t dict_main;
+
+    #if MICROPY_PY_SYS
+    // If MICROPY_PY_SYS_PATH_ARGV_DEFAULTS is not enabled then these two lists
+    // must be initialised after the call to mp_init.
+    mp_obj_list_t mp_sys_path_obj;
+    mp_obj_list_t mp_sys_argv_obj;
+    #endif
+
+    // dictionary for overridden builtins
+    #if MICROPY_CAN_OVERRIDE_BUILTINS
+    mp_obj_dict_t *mp_module_builtins_override_dict;
+    #endif
+
+    #if MICROPY_PERSISTENT_CODE_TRACK_RELOC_CODE
+    // An mp_obj_list_t that tracks relocated native code to prevent the GC from reclaiming them.
+    mp_obj_t track_reloc_code_list;
+    #endif
+
+    // include any root pointers defined by a port
+    MICROPY_PORT_ROOT_POINTERS
+
+    // root pointers for extmod
+
+    #if MICROPY_REPL_EVENT_DRIVEN
+    vstr_t *repl_line;
+    #endif
+
+    #if MICROPY_VFS
+    struct _mp_vfs_mount_t *vfs_cur;
+    struct _mp_vfs_mount_t *vfs_mount_table;
+    #endif
+
+    //
+    // END ROOT POINTER SECTION
+    ////////////////////////////////////////////////////////////
+
+    // pointer and sizes to store interned string data
+    // (qstr_last_chunk can be root pointer but is also stored in qstr pool)
+    char *qstr_last_chunk;
+    size_t qstr_last_alloc;
+    size_t qstr_last_used;
+
+    #if MICROPY_PY_THREAD && !MICROPY_PY_THREAD_GIL
+    // This is a global mutex used to make qstr interning thread-safe.
+    mp_thread_mutex_t qstr_mutex;
+    #endif
+
+    #if MICROPY_ENABLE_COMPILER
+    mp_uint_t mp_optimise_value;
+    #if MICROPY_EMIT_NATIVE
+    uint8_t default_emit_opt; // one of MP_EMIT_OPT_xxx
+    #endif
+    #endif
+
+    // size of the emergency exception buf, if it's dynamically allocated
+    #if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF && MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE == 0
+    mp_int_t mp_emergency_exception_buf_size;
+    #endif
+
+    #if MICROPY_ENABLE_SCHEDULER
+    volatile int16_t sched_state;
+    uint8_t sched_len;
+    uint8_t sched_idx;
+    #endif
+
+    #if MICROPY_PY_THREAD_GIL
+    // This is a global mutex used to make the VM/runtime thread-safe.
+    mp_thread_mutex_t gil_mutex;
+    #endif
+
+    #if MICROPY_OPT_MAP_LOOKUP_CACHE
+    // See mp_map_lookup.
+    uint8_t map_lookup_cache[MICROPY_OPT_MAP_LOOKUP_CACHE_SIZE];
+    #endif
+} mp_state_vm_t;
+
+// This structure holds state that is specific to a given thread.
+// Everything in this structure is scanned for root pointers.
+typedef struct _mp_state_thread_t {
+    // Stack top at the start of program
+    char *stack_top;
+
+    #if MICROPY_MAX_STACK_USAGE
+    char *stack_bottom;
+    #endif
+
+    #if MICROPY_STACK_CHECK
+    size_t stack_limit;
+    #endif
+
+    #if MICROPY_ENABLE_PYSTACK
+    uint8_t *pystack_start;
+    uint8_t *pystack_end;
+    uint8_t *pystack_cur;
+    #endif
+
+    // Locking of the GC is done per thread.
+    uint16_t gc_lock_depth;
+
+    ////////////////////////////////////////////////////////////
+    // START ROOT POINTER SECTION
+    // Everything that needs GC scanning must start here, and
+    // is followed by state in the mp_state_vm_t structure.
+    //
+
+    mp_obj_dict_t *dict_locals;
+    mp_obj_dict_t *dict_globals;
+
+    nlr_buf_t *nlr_top;
+
+    // pending exception object (MP_OBJ_NULL if not pending)
+    volatile mp_obj_t mp_pending_exception;
+
+    // If MP_OBJ_STOP_ITERATION is propagated then this holds its argument.
+    mp_obj_t stop_iteration_arg;
+
+    #if MICROPY_PY_SYS_SETTRACE
+    mp_obj_t prof_trace_callback;
+    bool prof_callback_is_executing;
+    struct _mp_code_state_t *current_code_state;
+    #endif
+} mp_state_thread_t;
+
+// This structure combines the above 3 structures.
+// The order of the entries are important for root pointer scanning in the GC to work.
+typedef struct _mp_state_ctx_t {
+    mp_state_thread_t thread;
+    mp_state_vm_t vm;
+    mp_state_mem_t mem;
+} mp_state_ctx_t;
+
+extern mp_state_ctx_t mp_state_ctx;
+
+#define MP_STATE_VM(x) (mp_state_ctx.vm.x)
+#define MP_STATE_MEM(x) (mp_state_ctx.mem.x)
+#define MP_STATE_MAIN_THREAD(x) (mp_state_ctx.thread.x)
+
+#if MICROPY_PY_THREAD
+extern mp_state_thread_t *mp_thread_get_state(void);
+#define MP_STATE_THREAD(x) (mp_thread_get_state()->x)
+#else
+#define MP_STATE_THREAD(x)  MP_STATE_MAIN_THREAD(x)
+#endif
+
+#endif // MICROPY_INCLUDED_PY_MPSTATE_H