s2: 实用代码
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涛歌依旧
毕业后就职于华为和腾讯
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漫话Redis源码之一百一十七
/* we assume IEEE 754 internal format for single and double precision floats. */void mp_encode_double(lua_State *L, mp_buf *buf, double d) { unsigned char b[9]; float f = d; assert(sizeof(f) == 4 && sizeof(d) == 8); if (d == ...原创 2022-05-01 22:35:09 · 980 阅读 · 1 评论 -
漫话Redis源码之一百一十六
static int b_unpack (lua_State *L) { Header h; const char *fmt = luaL_checkstring(L, 1); size_t ld; const char *data = luaL_checklstring(L, 2, &ld); size_t pos = luaL_optinteger(L, 3, 1); luaL_argcheck(L, pos > 0, 3, "offset must be...原创 2022-04-24 22:39:25 · 1734 阅读 · 1 评论 -
漫话Redis源码之一百一十五
#define IS(s) (strcmp(argv[i],s)==0)static int doargs(int argc, char* argv[]){ int i; int version=0; if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0]; for (i=1; i<argc; i++) { if (*argv[i]!='-') /* end of options; keep it */...原创 2022-04-24 22:38:09 · 759 阅读 · 1 评论 -
漫话Redis源码之一百一十四
typedef struct { lua_State* L; ZIO* Z; Mbuffer* b; const char* name;} LoadState;#ifdef LUAC_TRUST_BINARIES#define IF(c,s)#define error(S,s)#else#define IF(c,s) if (c) error(S,s)static void error(LoadState* S, const char* why){ luaO_pus...原创 2022-04-17 22:42:49 · 829 阅读 · 2 评论 -
漫话Redis源码之一百零一十三
static void traceexec (lua_State *L, const Instruction *pc) { lu_byte mask = L->hookmask; const Instruction *oldpc = L->savedpc; L->savedpc = pc; if ((mask & LUA_MASKCOUNT) && L->hookcount == 0) { resethookcount(L);...原创 2022-04-17 22:41:29 · 618 阅读 · 1 评论 -
漫话Redis源码之一百一十二
#include <string.h>#define lzio_c#define LUA_CORE#include "lua.h"#include "llimits.h"#include "lmem.h"#include "lstate.h"#include "lzio.h"int luaZ_fill (ZIO *z) { size_t size; lua_State *L = z->L; const char *buff; lua_...原创 2022-04-10 23:36:12 · 773 阅读 · 1 评论 -
漫话Redis源码之一百一十一
#include <ctype.h>#include <stdio.h>#define luac_c#define LUA_CORE#include "ldebug.h"#include "lobject.h"#include "lopcodes.h"#include "lundump.h"#define PrintFunction luaU_print#define Sizeof(x) ((int)sizeof(x))#define VOID(...原创 2022-04-10 23:37:35 · 777 阅读 · 1 评论 -
漫话Redis源码之一百一十
strbuf_t *strbuf_new(int len){ strbuf_t *s; s = malloc(sizeof(strbuf_t)); if (!s) die("Out of memory"); strbuf_init(s, len); /* Dynamic strbuf allocation / deallocation */ s->dynamic = 1; return s;}void s...原创 2022-04-10 23:34:57 · 755 阅读 · 2 评论 -
漫话Redis源码之一百零九
int Auth_CreateModuleUser(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { REDISMODULE_NOT_USED(argv); REDISMODULE_NOT_USED(argc); if (global) { RedisModule_FreeModuleUser(global); } global = RedisModule_CreateM...原创 2022-03-27 21:59:00 · 733 阅读 · 0 评论 -
漫话Redis源码之一百零八
/* TEST.STRING.APPEND -- Test appending to an existing string object. */int TestStringAppend(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { REDISMODULE_NOT_USED(argv); REDISMODULE_NOT_USED(argc); RedisModuleString *s = RedisM...原创 2022-03-20 22:30:58 · 1059 阅读 · 0 评论 -
漫话Redis源码之一百零七
#define REDISMODULE_EXPERIMENTAL_API#include "redismodule.h"#include <assert.h>#include <stdio.h>#include <pthread.h>#define UNUSED(V) ((void) V)void *sub_worker(void *arg) { // Get Redis module context RedisModuleCtx...原创 2022-03-20 22:29:42 · 629 阅读 · 0 评论 -
漫话Redis源码之一百零六
#define UNUSED(x) (void)(x)/* Reply callback for blocking command BLOCK.DEBUG */int HelloBlock_Reply(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { UNUSED(argv); UNUSED(argc); int *myint = RedisModule_GetBlockedClientPrivate...原创 2022-03-20 22:28:18 · 739 阅读 · 0 评论 -
漫话Redis源码之一百零五
void fsl_rdb_save(RedisModuleIO *rdb, void *value) { fsl_t *fsl = value; RedisModule_SaveUnsigned(rdb,fsl->length); for (long long i = 0; i < fsl->length; i++) RedisModule_SaveSigned(rdb, fsl->list[i]);}void fsl_aofr...原创 2022-03-20 22:26:28 · 545 阅读 · 1 评论 -
漫话Redis源码之一百零四
#define REDISMODULE_EXPERIMENTAL_API#include "redismodule.h"#include <string.h>static RedisModuleString *log_key_name;static const char log_command_name[] = "commandfilter.log";static const char ping_command_name[] = "commandfilter.ping"...原创 2022-03-20 22:25:26 · 526 阅读 · 1 评论 -
漫话Redis源码之一百零三
/* This module current tests a small subset but should be extended in the future * for general ModuleDataType coverage. */#include "redismodule.h"static RedisModuleType *datatype = NULL;typedef struct { long long intval; RedisModuleStr...原创 2022-03-13 23:00:09 · 680 阅读 · 2 评论 -
漫话Redis源码之一百零二
/* A module that implements defrag callback mechanisms. */#define REDISMODULE_EXPERIMENTAL_API#include "redismodule.h"static RedisModuleType *FragType;struct FragObject { unsigned long len; void **values; int maxstep;};/* Make s...原创 2022-03-13 22:58:27 · 426 阅读 · 1 评论 -
漫话Redis源码之一百零一
#define REDISMODULE_EXPERIMENTAL_API/* define macros for having usleep */#define _BSD_SOURCE#define _DEFAULT_SOURCE#include "redismodule.h"#include <string.h>#include <assert.h>#include <unistd.h>#define UNUSED(V) ((void) ...原创 2022-03-13 22:56:07 · 417 阅读 · 0 评论 -
漫话Redis源码之九十九
#include "redismodule.h"#include <strings.h>#include <assert.h>#include <unistd.h>#include <errno.h>#define UNUSED(V) ((void) V)/* A sample movable keys command that returns a list of all * arguments that follow a KEY ...原创 2022-03-13 22:53:21 · 427 阅读 · 1 评论 -
漫话Redis源码之九十八
/* If a string is ":deleted:", the special value for deleted hash fields is * returned; otherwise the input string is returned. */static RedisModuleString *value_or_delete(RedisModuleString *s) { if (!strcasecmp(RedisModule_StringPtrLen(s, NULL)...原创 2022-03-13 22:52:09 · 323 阅读 · 1 评论 -
漫话Redis源码之九十七
#include "redismodule.h"#include <stdio.h>#include <string.h>/* We need to store events to be able to test and see what we got, and we can't * store them in the key-space since that would mess up rdb loading (duplicates) * and be los...原创 2022-03-13 22:50:22 · 398 阅读 · 0 评论 -
漫话Redis源码之九十六
#include "redismodule.h"#include <string.h>void InfoFunc(RedisModuleInfoCtx *ctx, int for_crash_report) { RedisModule_InfoAddSection(ctx, ""); RedisModule_InfoAddFieldLongLong(ctx, "global", -2); RedisModule_InfoAddFieldULongLo...原创 2022-03-13 22:49:10 · 431 阅读 · 1 评论 -
漫话Redis源码之九十五
static int KeySpace_NotificationGeneric(RedisModuleCtx *ctx, int type, const char *event, RedisModuleString *key) { REDISMODULE_NOT_USED(type); if (strcmp(event, "del") == 0) { RedisModuleString *copykey = RedisModule_CreateStringPrin...原创 2022-03-07 23:46:54 · 421 阅读 · 0 评论 -
漫话Redis源码之九十四
主要是一些测试函数：#define UNUSED(x) (void)(x)int test_call_generic(RedisModuleCtx *ctx, RedisModuleString **argv, int argc){ if (argc<2) { RedisModule_WrongArity(ctx); return REDISMODULE_OK; } const char* cmdname = RedisModule原创 2022-03-07 23:45:52 · 380 阅读 · 0 评论 -
漫话Redis源码之九十三
#define REDISMODULE_EXPERIMENTAL_API#include "redismodule.h"#include <pthread.h>/* Timer callback. */void timerHandler(RedisModuleCtx *ctx, void *data) { REDISMODULE_NOT_USED(ctx); REDISMODULE_NOT_USED(data); static int times =...原创 2022-03-07 23:44:58 · 330 阅读 · 0 评论 -
漫话Redis源码之九十一
#include <string.h>#include <strings.h>#include <assert.h>#include <unistd.h>#include <errno.h>/* Command which adds a stream entry with automatic ID, like XADD *. * * Syntax: STREAM.ADD key field1 value1 [ fiel...原创 2022-02-27 22:06:01 · 585 阅读 · 0 评论 -
漫话Redis源码之八十九
#include <stdio.h>#include <fcntl.h>#include <sys/stat.h>#include <stdlib.h>#include <unistd.h>#include <time.h>int main(int argc, char **argv) { struct stat stat; int fd, cycles; if (argc != 3...原创 2022-02-27 22:03:15 · 396 阅读 · 0 评论 -
漫话Redis源码之八十八
#include <stdio.h>#include <fcntl.h>#include <sys/stat.h>#include <stdlib.h>#include <unistd.h>#include <time.h>int main(int argc, char **argv) { struct stat stat; int fd, cycles; if (argc != 3...原创 2022-02-27 22:00:51 · 416 阅读 · 0 评论 -
漫话Redis源码之八十七
/* Given an SDS string, returns the SHA256 hex representation as a * new SDS string. */sds ACLHashPassword(unsigned char *cleartext, size_t len) { SHA256_CTX ctx; unsigned char hash[SHA256_BLOCK_SIZE]; char hex[HASH_PASSWORD_LEN]; ch...原创 2022-02-20 22:45:46 · 684 阅读 · 1 评论 -
漫话Redis源码之八十六
/* Create a new list. The created list can be freed with * listRelease(), but private value of every node need to be freed * by the user before to call listRelease(), or by setting a free method using * listSetFreeMethod. * * On error, NULL is ...原创 2022-02-20 22:43:58 · 427 阅读 · 0 评论 -
漫话Redis源码之八十五
/* Include the best multiplexing layer supported by this system. * The following should be ordered by performances, descending. */#ifdef HAVE_EVPORT#include "ae_evport.c"#else #ifdef HAVE_EPOLL #include "ae_epoll.c" #else #if...原创 2022-02-20 22:42:44 · 476 阅读 · 0 评论 -
漫话Redis源码之八十四
#include <sys/epoll.h>typedef struct aeApiState { int epfd; struct epoll_event *events;} aeApiState;static int aeApiCreate(aeEventLoop *eventLoop) { aeApiState *state = zmalloc(sizeof(aeApiState)); if (!state) return -1; ...原创 2022-02-20 22:41:05 · 430 阅读 · 0 评论 -
漫话Redis源码之八十三
static int aeApiLookupPending(aeApiState *state, int fd) { uint_t i; for (i = 0; i < state->npending; i++) { if (state->pending_fds[i] == fd) return (i); } return (-1);}/* * Helper function to invoke ...原创 2022-02-13 21:53:23 · 988 阅读 · 0 评论 -
漫话Redis源码之八十二
#include <sys/types.h>#include <sys/event.h>#include <sys/time.h>typedef struct aeApiState { int kqfd; struct kevent *events; /* Events mask for merge read and write event. * To reduce memory consumption, we use...原创 2022-02-13 21:52:12 · 602 阅读 · 0 评论 -
漫话Redis源码之八十一
#include <sys/select.h>#include <string.h>typedef struct aeApiState { fd_set rfds, wfds; /* We need to have a copy of the fd sets as it's not safe to reuse * FD sets after select(). */ fd_set _rfds, _wfds;} aeApiState;...原创 2022-02-13 21:50:07 · 404 阅读 · 0 评论 -
漫话Redis源码之八十
#include "anet.h"static void anetSetError(char *err, const char *fmt, ...){ va_list ap; if (!err) return; va_start(ap, fmt); vsnprintf(err, ANET_ERR_LEN, fmt, ap); va_end(ap);}int anetSetBlock(char *err, int fd, int non_bloc...原创 2022-02-13 21:48:03 · 506 阅读 · 0 评论 -
漫话Redis源码之七十九
/* Return the current size of the AOF rewrite buffer. */unsigned long aofRewriteBufferSize(void) { listNode *ln; listIter li; unsigned long size = 0; listRewind(server.aof_rewrite_buf_blocks,&li); while((ln = listNext(&li))...原创 2022-02-13 21:44:09 · 479 阅读 · 0 评论 -
漫话Redis源码之七十八
bio操作相关的实现，对于线程，互斥量，条件变量，也需要理解清楚哦。原创 2022-02-13 21:42:41 · 462 阅读 · 1 评论 -
漫话Redis源码之七十七
/* The following set.*Bitfield and get.*Bitfield functions implement setting * and getting arbitrary size (up to 64 bits) signed and unsigned integers * at arbitrary positions into a bitmap. * * The representation considers the bitmap as having th...原创 2022-02-13 21:41:09 · 452 阅读 · 1 评论 -
漫话Redis源码之七十六
/* This function is called in the beforeSleep() function of the event loop * in order to process the pending input buffer of clients that were * unblocked after a blocking operation. */void processUnblockedClients(void) { listNode *ln; cl...原创 2022-02-13 21:39:11 · 793 阅读 · 0 评论 -
漫话Redis源码之七十五
#include "server.h"#include <unistd.h>typedef struct { size_t keys; size_t cow; monotime cow_updated; double progress; childInfoType information_type; /* Type of information */} child_info_data;/* Open a child-parent ...原创 2022-02-13 21:37:53 · 292 阅读 · 1 评论