POSIX 为创建、映射、同步和取消共享内存段提供五个入口点: shm_open():创建共享内存段或连接到现有的已命名内存段。这个系统调用返回一个文件描述符。 shm_unlink():根据(shm_open() 返回的)文件描述符,删除共享内存段。实际上,这个内存段直到访问它的所有进程都退出时才会删除,这与在 UNIX 中删除文件很相似。
case SEEK_SET: ^ /verification_workspace/zephyr/lib/posix/options/shm.c:147:7: error: use of undeclared identifier 'SEEK_CUR' case SEEK_CUR: ^ /verification_workspace/zephyr/lib/posix/options/shm.c:150:7: error: use of undeclared identifier 'SEEK_END' case SEEK_END: ^ 3 errors generate...
In this particular case, you should add a "shm driver" for the lib/is/fdtable.c The API for that is in include/zephyr/fdtable.h. A good reference about how you can do that is in lib/posix/eventfd.c. Additionally, for shared memory, you will probably want to add a new testsuite ...
<sys/shm.h>(P) POSIX Programmer's Manual <sys/shm.h>(P)NAME sys/shm.h - XSI shared memory facilitySYNOPSIS #include <sys/shm.h>DESCRIPTION The <sys/shm.h> header shall define the following symbolic constants: SHM_RDONLY Attach read-only (else read-write). SHM_RND Round attach addres...
shm_open, shm_unlink - create/open or unlink POSIX shared memory objects LIBRARY Real-time library (librt,-lrt) SYNOPSIS #include<sys/mman.h>#include<sys/stat.h>/* For mode constants */#include<fcntl.h>/* For O_* constants */intshm_open(constchar*name,intoflag,mode_tmode);intshm_...
Static code scan issues found in file: https://github.com/zephyrproject-rtos/zephyr/tree/dcf42917c550714d2457947538b9e29d083e872e/lib/posix/options/shm.c Category: Control flow issues Function: shm_open Component: Other CID: 392509 Detai...
CxxSHM A C++ Library to handle POSIX shared memory Usage Initialize cxxshm::SharedMemory Option A: Create Shared Memory const std::string shm_name = "example_shm"; // shared memory name constexpr std::size_t shm_size = 4096; // shared memory size constexpr bool read_only = false; /...