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

[Kazushi Marukawa via Phabricator via libcxx-commits]

kaz7 created this revision.
kaz7 added reviewers: ldionne, simoll, k-ishizaka.
kaz7 added projects: libc++, VE.
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kaz7 requested review of this revision.
Herald added a subscriber: libcxx-commits.
Herald added a reviewer: libc++.

Define FUTEX values in atomic.cpp since VEOS doesn't have its own
futex.h.  Detailes are written in the source code comments.


Repository:
  rG LLVM Github Monorepo

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>
 
 #else // <- Add other operating systems here


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