diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/alpha/SYS.h | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/lib/libc/alpha/SYS.h b/lib/libc/alpha/SYS.h index 76daf5a..40f9808 100644 --- a/lib/libc/alpha/SYS.h +++ b/lib/libc/alpha/SYS.h @@ -1,4 +1,4 @@ -/* $Id$ */ +/* $Id: SYS.h,v 1.1.1.1 1998/03/09 06:34:40 jb Exp $ */ /* From: NetBSD: SYS.h,v 1.5 1997/05/02 18:15:15 kleink Exp */ /* @@ -74,5 +74,54 @@ LEAF(label,0); /* XXX # of args? */ \ RET; \ END(label); +/* + * Design note: + * + * The macros PSYSCALL() and PRSYSCALL() are intended for use where a + * syscall needs to be renamed in the threaded library. When building + * a normal library, they default to the traditional SYSCALL() and + * RSYSCALL(). This avoids the need to #ifdef _THREAD_SAFE everywhere + * that the renamed function needs to be called. + */ +#ifdef _THREAD_SAFE +/* + * For the thread_safe versions, we prepend _thread_sys_ to the function + * name so that the 'C' wrapper can go around the real name. + */ +#define PCALL(name) \ + CALL(___CONCAT(_thread_sys_,name)) + +#define PLEAF(name, args) \ +LEAF(___CONCAT(_thread_sys_,name),args) + +#define PEND(name) \ +END(___CONCAT(_thread_sys_,name)) + +#define PSYSCALL(name) \ +PLEAF(name,0); /* XXX # of args? */ \ + CALLSYS_ERROR(name) + +#define PRSYSCALL(name) \ +PLEAF(name,0); /* XXX # of args? */ \ + CALLSYS_ERROR(name) \ + RET; \ +PEND(name) + +#define PPSEUDO(label,name) \ +PLEAF(label,0); /* XXX # of args? */ \ + CALLSYS_ERROR(name); \ + RET; \ +PEND(label) + +#else +/* + * The non-threaded library defaults to traditional syscalls where + * the function name matches the syscall name. + */ +#define PSYSCALL(x) SYSCALL(x) #define PRSYSCALL(x) RSYSCALL(x) #define PPSEUDO(x,y) PSEUDO(x,y) +#define PLEAF(x,y) LEAF(x,y) +#define PEND(x) END(x) +#define PCALL(x) CALL(x) +#endif |
