257 lines
7.6 KiB
C
257 lines
7.6 KiB
C
// Cron module
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#include "module.h"
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#include "lauxlib.h"
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#include "lmem.h"
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#include "user_interface.h"
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#include <stdint.h>
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#include <stddef.h>
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#include <string.h>
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#include "ets_sys.h"
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#include "time.h"
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#include "rtc/rtctime.h"
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#include "mem.h"
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struct cronent_desc {
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uint64_t min; // Minutes repeat - bits 0-59
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uint32_t hour; // Hours repeat - bits 0-23
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uint32_t dom; // Day-of-month repeat - bits 0-30
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uint16_t mon; // Monthly repeat - bits 0-11
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uint8_t dow; // Day-of-week repeat - bits 0-6
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};
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typedef struct cronent_ud {
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struct cronent_desc desc;
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int cb_ref;
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} cronent_ud_t;
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static ETSTimer cron_timer;
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static int *cronent_list = 0;
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static size_t cronent_count = 0;
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static uint64_t lcron_parsepart(lua_State *L, char *str, char **end, uint8_t min, uint8_t max) {
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uint64_t res = 0;
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/* Gobble whitespace before potential stars; no strtol on that path */
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while (*str != '\0' && (*str == ' ' || *str == '\t')) {
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str++;
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}
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if (str[0] == '*') {
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uint32_t each = 1;
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*end = str + 1;
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if (str[1] == '/') {
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each = strtol(str + 2, end, 10);
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if (each == 0 || each >= max - min) {
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return luaL_error(L, "invalid spec (each %d)", each);
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}
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}
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for (int i = 0; i <= (max - min); i++) {
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if ((i % each) == 0) res |= (uint64_t)1 << i;
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}
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} else {
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uint32_t val;
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while (1) {
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val = strtol(str, end, 10);
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if (val < min || val > max) {
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return luaL_error(L, "invalid spec (val %d out of range %d..%d)", val, min, max);
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}
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res |= (uint64_t)1 << (val - min);
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if (**end != ',') break;
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str = *end + 1;
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}
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}
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return res;
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}
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static int lcron_parsedesc(lua_State *L, char *str, struct cronent_desc *desc) {
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char *s = str;
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desc->min = lcron_parsepart(L, s, &s, 0, 59);
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if (*s != ' ' && *s != '\t') return luaL_error(L, "invalid spec (separator @%d)", s - str);
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desc->hour = lcron_parsepart(L, s + 1, &s, 0, 23);
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if (*s != ' ' && *s != '\t') return luaL_error(L, "invalid spec (separator @%d)", s - str);
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desc->dom = lcron_parsepart(L, s + 1, &s, 1, 31);
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if (*s != ' ' && *s != '\t') return luaL_error(L, "invalid spec (separator @%d)", s - str);
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desc->mon = lcron_parsepart(L, s + 1, &s, 1, 12);
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if (*s != ' ' && *s != '\t') return luaL_error(L, "invalid spec (separator @%d)", s - str);
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desc->dow = lcron_parsepart(L, s + 1, &s, 0, 6);
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while (*s != '\0' && (*s == ' ' || *s == '\t')) {
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s++;
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}
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if (*s != 0) return luaL_error(L, "invalid spec (trailing @%d)", s - str);
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return 0;
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}
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static int lcron_create(lua_State *L) {
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// Check arguments
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char *strdesc = (char*)luaL_checkstring(L, 1);
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void *newlist;
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luaL_checktype(L, 2, LUA_TFUNCTION);
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// Parse description
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struct cronent_desc desc;
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lcron_parsedesc(L, strdesc, &desc);
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// Allocate userdata
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cronent_ud_t *ud = lua_newuserdata(L, sizeof(cronent_ud_t));
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// Set metatable
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luaL_getmetatable(L, "cron.entry");
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lua_setmetatable(L, -2);
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// Set callback
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lua_pushvalue(L, 2);
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ud->cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
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// Set entry
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ud->desc = desc;
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// Store entry
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newlist = os_realloc(cronent_list, sizeof(int) * (cronent_count + 1));
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if (newlist == NULL) {
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return luaL_error(L, "out of memory");
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}
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lua_pushvalue(L, -1);
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cronent_list = newlist;
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cronent_list[cronent_count++] = luaL_ref(L, LUA_REGISTRYINDEX);
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return 1;
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}
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static size_t lcron_findindex(lua_State *L, cronent_ud_t *ud) {
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cronent_ud_t *eud;
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size_t i;
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for (i = 0; i < cronent_count; i++) {
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lua_rawgeti(L, LUA_REGISTRYINDEX, cronent_list[i]);
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eud = lua_touserdata(L, -1);
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lua_pop(L, 1);
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if (eud == ud) break;
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}
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if (i == cronent_count) return -1;
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return i;
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}
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static int lcron_schedule(lua_State *L) {
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cronent_ud_t *ud = luaL_checkudata(L, 1, "cron.entry");
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char *strdesc = (char*)luaL_checkstring(L, 2);
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struct cronent_desc desc;
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lcron_parsedesc(L, strdesc, &desc);
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ud->desc = desc;
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size_t i = lcron_findindex(L, ud);
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if (i == -1) {
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void *newlist;
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newlist = os_realloc(cronent_list, sizeof(int) * (cronent_count + 1));
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if (newlist == NULL) {
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return luaL_error(L, "out of memory");
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}
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cronent_list = newlist;
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lua_pushvalue(L, 1);
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cronent_list[cronent_count++] = luaL_ref(L, LUA_REGISTRYINDEX);
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}
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return 0;
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}
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static int lcron_handler(lua_State *L) {
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cronent_ud_t *ud = luaL_checkudata(L, 1, "cron.entry");
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luaL_checktype(L, 2, LUA_TFUNCTION);
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lua_pushvalue(L, 2);
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luaL_unref(L, LUA_REGISTRYINDEX, ud->cb_ref);
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ud->cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
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return 0;
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}
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static int lcron_unschedule(lua_State *L) {
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cronent_ud_t *ud = luaL_checkudata(L, 1, "cron.entry");
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size_t i = lcron_findindex(L, ud);
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if (i == -1) return 0;
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luaL_unref(L, LUA_REGISTRYINDEX, cronent_list[i]);
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memmove(cronent_list + i, cronent_list + i + 1, sizeof(int) * (cronent_count - i - 1));
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cronent_count--;
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return 0;
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}
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static int lcron_delete(lua_State *L) {
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cronent_ud_t *ud = luaL_checkudata(L, 1, "cron.entry");
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lcron_unschedule(L);
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luaL_unref(L, LUA_REGISTRYINDEX, ud->cb_ref);
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return 0;
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}
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static int lcron_reset(lua_State *L) {
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for (size_t i = 0; i < cronent_count; i++) {
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luaL_unref(L, LUA_REGISTRYINDEX, cronent_list[i]);
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}
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cronent_count = 0;
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free(cronent_list);
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cronent_list = 0;
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return 0;
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}
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static void cron_handle_time(uint8_t mon, uint8_t dom, uint8_t dow, uint8_t hour, uint8_t min) {
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lua_State *L = lua_getstate();
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struct cronent_desc desc;
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desc.mon = (uint16_t)1 << (mon - 1);
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desc.dom = (uint32_t)1 << (dom - 1);
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desc.dow = ( uint8_t)1 << dow;
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desc.hour = (uint32_t)1 << hour;
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desc.min = (uint64_t)1 << min;
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for (size_t i = 0; i < cronent_count; i++) {
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lua_rawgeti(L, LUA_REGISTRYINDEX, cronent_list[i]);
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cronent_ud_t *ent = lua_touserdata(L, -1);
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lua_pop(L, 1);
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if ((ent->desc.mon & desc.mon ) == 0) continue;
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if ((ent->desc.dom & desc.dom ) == 0) continue;
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if ((ent->desc.dow & desc.dow ) == 0) continue;
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if ((ent->desc.hour & desc.hour) == 0) continue;
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if ((ent->desc.min & desc.min ) == 0) continue;
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lua_rawgeti(L, LUA_REGISTRYINDEX, ent->cb_ref);
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lua_rawgeti(L, LUA_REGISTRYINDEX, cronent_list[i]);
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luaL_pcallx(L, 1, 0);
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}
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}
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static void cron_handle_tmr() {
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struct rtc_timeval tv;
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rtctime_gettimeofday(&tv);
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if (tv.tv_sec == 0) { // Wait for RTC time
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os_timer_arm(&cron_timer, 1000, 0);
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return;
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}
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time_t t = tv.tv_sec;
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struct tm tm;
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gmtime_r(&t, &tm);
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uint32_t diff = 60000 - tm.tm_sec * 1000 - tv.tv_usec / 1000;
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if (tm.tm_sec == 59) {
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t++;
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diff += 60000;
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gmtime_r(&t, &tm);
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}
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os_timer_arm(&cron_timer, diff, 0);
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cron_handle_time(tm.tm_mon + 1, tm.tm_mday, tm.tm_wday, tm.tm_hour, tm.tm_min);
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}
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LROT_BEGIN(cronent, NULL, LROT_MASK_GC_INDEX)
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LROT_FUNCENTRY( __gc, lcron_delete )
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LROT_TABENTRY( __index, cronent )
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LROT_FUNCENTRY( schedule, lcron_schedule )
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LROT_FUNCENTRY( handler, lcron_handler )
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LROT_FUNCENTRY( unschedule, lcron_unschedule )
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LROT_END(cronent, NULL, LROT_MASK_GC_INDEX)
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LROT_BEGIN(cron, NULL, 0)
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LROT_FUNCENTRY( schedule, lcron_create )
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LROT_FUNCENTRY( reset, lcron_reset )
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LROT_END(cron, NULL, 0)
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#include "pm/swtimer.h"
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int luaopen_cron( lua_State *L ) {
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os_timer_disarm(&cron_timer);
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os_timer_setfn(&cron_timer, cron_handle_tmr, 0);
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SWTIMER_REG_CB(cron_handle_tmr, SWTIMER_RESTART);
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//cron_handle_tmr determines when to execute a scheduled cron job
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//My guess: To be sure to give the other modules required by cron enough time to get to a ready state, restart cron_timer.
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os_timer_arm(&cron_timer, 1000, 0);
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luaL_rometatable(L, "cron.entry", LROT_TABLEREF(cronent));
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return 0;
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}
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NODEMCU_MODULE(CRON, "cron", cron, luaopen_cron);
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