[libcxx-commits] [PATCH] D94909: [VE] Define FUTEX values

[Kazushi Marukawa via Phabricator via libcxx-commits]

kaz7 updated this revision to Diff 391810.
kaz7 added a comment.

Rebase to the latest main.  VE is now an official target of llvm.
I would like to support libcxx for VE also.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D94909/new/

https://reviews.llvm.org/D94909

Files:
  libcxx/src/atomic.cpp


Index: libcxx/src/atomic.cpp
===================================================================
--- libcxx/src/atomic.cpp
+++ libcxx/src/atomic.cpp
@@ -16,7 +16,18 @@
 #ifdef __linux__
 
 #include <unistd.h>
+#if defined(__ve__)
+// VE doesn't have linux/futex.h.  But, VEOS implements some FUTEX system calls.
+// These system calls are good enough for libcxx.  Therefore, we define FUTEX
+// flags here locally to compile libcxx using FUTEX system calls.
+#  define FUTEX_WAIT         0
+#  define FUTEX_WAKE         1
+#  define FUTEX_PRIVATE_FLAG 128
+#  define FUTEX_WAIT_PRIVATE (FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
+#  define FUTEX_WAKE_PRIVATE (FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
+#else
 #include <linux/futex.h>
+#endif
 #include <sys/syscall.h>
 
 // libc++ uses SYS_futex as a universal syscall name. However, on 32 bit architectures


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