[libc-commits] [PATCH] D74530: [libc] Add Convenience syscall Template Function

[Alex Brachet via Phabricator via libc-commits]

abrachet updated this revision to Diff 244484.
abrachet edited the summary of this revision.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D74530/new/

https://reviews.llvm.org/D74530

Files:
  libc/config/linux/x86_64/syscall.h.inc
  libc/test/config/linux/x86_64/syscall_test.cpp


Index: libc/test/config/linux/x86_64/syscall_test.cpp
===================================================================
--- libc/test/config/linux/x86_64/syscall_test.cpp
+++ libc/test/config/linux/x86_64/syscall_test.cpp
@@ -36,4 +36,9 @@
       [](long n, long a1, long a2, long a3, long a4, long a5, long a6) {
         return __llvm_libc::syscall(n, a1, a2, a3, a4, a5, a6);
       });
+
+  std::function<long(long, void *)> notLongType(
+      [](long n, void *a1) {
+        return __llvm_libc::syscall(n, a1);
+      });
 }
Index: libc/config/linux/x86_64/syscall.h.inc
===================================================================
--- libc/config/linux/x86_64/syscall.h.inc
+++ libc/config/linux/x86_64/syscall.h.inc
@@ -94,6 +94,13 @@
   return retcode;
 }
 
+template <typename... Ts>
+__attribute__((always_inline)) inline long syscall(long __number, Ts... ts) {
+  static_assert(sizeof...(Ts) <= 6, "Too many arguments for syscall");
+  return syscall(__number, (long)ts...);
+}
+
+
 #undef SYSCALL_CLOBBER_LIST
 
 } // namespace __llvm_libc


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