使用 gettid 獲取 thread id, compile 卻發生 error -> error: ‘gettid’ was not declared in this scope

 

照定義, 應該只要 include <sys/types.h> 即可,

但事與願違 ...

最後才找到有人分享 workaround

#include <unistd.h>
#include <sys/syscall.h>
#define gettid() syscall(SYS_gettid)

 

Reference:

1. gettid definition

http://man7.org/linux/man-pages/man2/gettid.2.html

2. solution to error -> error: ‘gettid’ was not declared in this scope

https://stackoverflow.com/questions/30680550/c-gettid-was-not-declared-in-this-scope

 

 

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