diff options
Diffstat (limited to 'sysdeps/unix/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysdep.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sysdeps/unix/sysdep.h b/sysdeps/unix/sysdep.h index 5fa658078e..52dad582ce 100644 --- a/sysdeps/unix/sysdep.h +++ b/sysdeps/unix/sysdep.h @@ -24,6 +24,27 @@ #define SYSCALL__(name, args) PSEUDO (__##name, name, args) #define SYSCALL(name, args) PSEUDO (name, name, args) +/* Cancellation macros. */ +#define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,n,...) n +#define __SYSCALL_NARGS(...) \ + __SYSCALL_NARGS_X (__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0,) + +#define SYSCALL_CANCEL(name, ...) \ + ({ \ + long int sc_ret; \ + if (SINGLE_THREAD_P) \ + sc_ret = INLINE_SYSCALL (name, __SYSCALL_NARGS(__VA_ARGS__), \ + __VA_ARGS__); \ + else \ + { \ + int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \ + sc_ret = INLINE_SYSCALL (name, __SYSCALL_NARGS (__VA_ARGS__), \ + __VA_ARGS__); \ + LIBC_CANCEL_RESET (sc_cancel_oldtype); \ + } \ + sc_ret; \ + }) + /* Machine-dependent sysdep.h files are expected to define the macro PSEUDO (function_name, syscall_name) to emit assembly code to define the C-callable function FUNCTION_NAME to do system call SYSCALL_NAME. @@ -31,7 +52,9 @@ an instruction such that "MOVE(r1, r0)" works. ret should be defined as the return instruction. */ +#ifndef SYS_ify #define SYS_ify(syscall_name) SYS_##syscall_name +#endif /* Terminate a system call named SYM. This is used on some platforms to generate correct debugging information. */ @@ -47,4 +70,6 @@ /* Wrappers around system calls should normally inline the system call code. But sometimes it is not possible or implemented and we use this code. */ +#ifndef INLINE_SYSCALL #define INLINE_SYSCALL(name, nr, args...) __syscall_##name (args) +#endif |