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https://wiki.unix7.org/ Fri, 24 Jul 2026 22:47:42 +0000 FeedCreator 1.8 https://wiki.unix7.org/lib/tpl/unix7/images/favicon.ico https://wiki.unix7.org/ https://wiki.unix7.org/c/genid c unix Simple pseudo-monotic id generator /* * Copyright 2023 Oleg Borodin <borodin@unix7.org> */ #include <stdlib.h> #include <stdint.h> #include <time.h> #include <stdio.h> #ifdef __linux__ #include <endian.h> #else #include <sys/endian.h> #endif int64_t getid(void) { uint64_t id = 0; struct timespec now; clock_gettime(CLOCK_REALTIME, &now); uint64_t nsec = (uint64_t)(now.tv_sec * 1000000) + (uint64_t)now.tv_nsec; uint64_t r = (uint64_t)(rand() % 0xFFFF); id … anonymous@undisclosed.example.com (Anonymous) Fri, 27 Jan 2023 11:19:58 +0000 https://wiki.unix7.org/c/getlex c unix Argument string analyzer /* * Copyright 2023 Oleg Borodin <borodin@unix7.org> */ #include <stdint.h> #include <stdlib.h> #include <stdbool.h> #include <unistd.h> #include <string.h> #include <stdio.h> #define RES_OK 0 #define RES_ERR -1 typedef struct { size_t rsize; size_t wsize; size_t capa; uint8_t* data; } bstream_t; #define STREAM_INITCAPA 64 int bstream_init(bstream_t * stream) { stream->data = malloc(STREAM_INITCAPA); stream->wsize = 0; stre… anonymous@undisclosed.example.com (Anonymous) Tue, 14 Feb 2023 14:04:34 +0000 https://wiki.unix7.org/c/getopt c unix Getopt but better Основание: меня еще 10 лет назад утомили мелкие глюки и разное поведение различных libc getopt. =) Note: не все проверки сделаны /* * Copyright 2023 Oleg Borodin <borodin@unix7.org> */ #include <stdbool.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #include <stdio.h> static bool isprefixed(char* str, char* prefix) { if ((str == NULL) || (prefix == NULL)) { return false; } if (strncmp(str, prefix, strlen(prefix)) == 0) { … anonymous@undisclosed.example.com (Anonymous) Wed, 11 Jan 2023 08:48:27 +0000 https://wiki.unix7.org/c/go-channel c go Go-like channel on ring buffer Behavior: * If the channel is full, channel_write() returns -1 * Calling channel_read() results in waiting for an element More complex behavior (wait with timeout, non-blocking read) is easily implemented. Поведение: anonymous@undisclosed.example.com (Anonymous) Sat, 31 Dec 2022 09:23:48 +0000 https://wiki.unix7.org/c/go-origin c go Corountine in Golang: Origin This is an example of implementation of cooperative multitasking on a single thread. I used library makecontext() and company. Это пример реализации кооперативной многозадачности на одном потоке. anonymous@undisclosed.example.com (Anonymous) Thu, 02 Jul 2026 20:15:11 +0000 https://wiki.unix7.org/c/go-slice Go-like dynamic array “Go-like”, хаха =) На самом деле алгоритм динамического массива используеться повсеместно лет 50, наверное. Поведение массива можно адаптировать под свои цели. anonymous@undisclosed.example.com (Anonymous) Wed, 04 Jan 2023 07:44:57 +0000 https://wiki.unix7.org/c/go-uchannel c go Go-like channel on unlimited queue Note: the code w/o some check of return values. /* * Copyright 2022 Oleg Borodin <borodin@unix7.org> */ #include <stdlib.h> #include <stdio.h> #include <stdint.h> #include <semaphore.h> #include <pthread.h> typedef struct cell cell_t; struct cell { cell_t* next; int data; }; cell_t* new_cell(int data) { cell_t* cell = malloc(sizeof(cell_t)); cell->data = data; cell->next = NULL; return cell; } void cell_free(cell_t* … anonymous@undisclosed.example.com (Anonymous) Sat, 31 Dec 2022 09:24:05 +0000 https://wiki.unix7.org/c/hwkeyval Embeded key-value database Пример key-value хранилища для встраиваемых систем. Например, для хранения конфигурации. Рассчитана на малый объем используемой оперативной памяти. Кроме дескриптора базы данных, все записи хранятся в устройстве периферийной памяти. Естественно, это увеличивает время доступа. Для меньшего времени доступа возможно использовать верхний слой-надстройку в оперативной памяти.… anonymous@undisclosed.example.com (Anonymous) Mon, 09 Jan 2023 08:25:01 +0000 https://wiki.unix7.org/c/lexer01 c unix Lexical and grammatical analyzer A simple and grammatical analyzer for simple syntax: ?? key = val # comment ?? Starts with the UNDEF context and ends with the ENDFL context. With more contexts it might make more sense to write a binary array of context transitions by event/characters. anonymous@undisclosed.example.com (Anonymous) Tue, 14 Feb 2023 14:05:54 +0000 https://wiki.unix7.org/c/mapper c unix Map of values /* * Copyright 2023 Oleg Borodin <borodin@unix7.org> */ #include <stdio.h> #include <stdbool.h> #include <stdlib.h> #include <string.h> static char* copystr(char* src) { size_t srcsize = strlen(src) + 1; char* dest = malloc(srcsize); memset(dest, '\0', srcsize); strcpy(dest, src); return dest; } typedef struct { char* name; int type; void* vptr; } mlink_t; #define MAPPER_STRING 1 #define MAPPER_INTEGER 2 #define MAPPER_B… anonymous@undisclosed.example.com (Anonymous) Mon, 06 Feb 2023 21:11:26 +0000 https://wiki.unix7.org/c/thread-cancel c go Cancel thread & waiting with semaphores /* * Copyright 2022 Oleg Borodin <borodin@unix7.org> */ #include <stdlib.h> #include <stdio.h> #include <stdbool.h> #include <unistd.h> #include <string.h> #include <semaphore.h> #include <pthread.h> #include <signal.h> #include <stdatomic.h> typedef struct { int ident; char* message; sem_t execsem; sem_t exitsem; sem_t donesem; atomic_int doexit; pthread_t thread; } worker_t; vo… anonymous@undisclosed.example.com (Anonymous) Fri, 30 Dec 2022 08:12:37 +0000 https://wiki.unix7.org/c/thread-sync Sync detached thread with semaphore Another decision is waitgroup. Note: the code w/o check of return values. /* * Copyright 2022 Oleg Borodin <borodin@unix7.org> */ #include <stdlib.h> #include <stdio.h> #include <stdbool.h> #include <unistd.h> #include <string.h> #include <semaphore.h> #include <pthread.h> typedef struct { sem_t sem; int ident; int state; } hello_t; hello_t* new_hello(int ident) { hello_t* hello = malloc(sizeof(hello_t)); hello->ident = ident; … anonymous@undisclosed.example.com (Anonymous) Fri, 30 Dec 2022 05:06:05 +0000 https://wiki.unix7.org/c/waitgroup c go Go-like waitgroup Note: w/o check of return values. /* * Copyright 2022 Oleg Borodin <borodin@unix7.org> */ #include <stdlib.h> #include <unistd.h> #include <semaphore.h> #include <pthread.h> #include <stdatomic.h> #include <stdio.h> typedef struct { sem_t sem; atomic_int num; } wg_t; wg_t* new_gw() { wg_t* wg = malloc(sizeof(wg_t)); wg->num = 0; sem_init(&(wg->sem), 1, 0); return wg; } void wg_add(wg_t* wg) { wg->num++; } void wg_done(wg_t* w… anonymous@undisclosed.example.com (Anonymous) Fri, 30 Dec 2022 05:41:33 +0000 https://wiki.unix7.org/c/worker-pool Thread pool with unlimited channel Пул работников с одной общей “неограниченной” очередью, мягкой остановкой, ожиданием остановки всей группы. Note: the code w/o some check of return values. anonymous@undisclosed.example.com (Anonymous) Mon, 09 Jan 2023 09:57:45 +0000