From: Christoph Reiter <reiter.christoph@gmail.com>
Date: Tue, 7 Jan 2020 23:48:26 +0000 (+0100)
Subject: Make UTIL_countPhysicalCores() work under Cygwin (#1941)
X-Git-Tag: v1.4.5^2~122
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0dcaf56c23d5691625b0b02ff106f08baa79f9c;p=thirdparty%2Fzstd.git

Make UTIL_countPhysicalCores() work under Cygwin (#1941)

Cygwin currently uses the fallback implementation which just returns 1 every time,
which leads to bad performance when zstd is called with -T0 for example.

Instead use the POSIX implementation used for the BSDs which works just fine under Cygwin.

Tested under Cygwin and MSYS2.
---

diff --git a/programs/util.c b/programs/util.c
index 51d848018..399507c2a 100644
--- a/programs/util.c
+++ b/programs/util.c
@@ -903,7 +903,7 @@ int UTIL_countPhysicalCores(void)
     return numPhysicalCores;
 }
 
-#elif defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#elif defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__CYGWIN__)
 
 /* Use POSIX sysconf
  * see: man 3 sysconf */