driconf: add workarounds for SPECviewperf13

[mesa.git] / src / util / rand_xor.c

diff --git a/src/util/rand_xor.c b/src/util/rand_xor.c
index b34b4e40bfa5233badb8a0b5d78d7dc279294081..81b64f1ea71712a49338e5b77bf9ae166413e671 100644 (file)
--- a/src/util/rand_xor.c
+++ b/src/util/rand_xor.c
@@ -22,17 +22,18 @@
  *
  */
 
-#if defined(__linux__)
+#include "detect_os.h"
+
+#if !DETECT_OS_WINDOWS
 #if defined(HAVE_GETRANDOM)
 #include <sys/random.h>
 #endif
-#include <sys/file.h>
 #include <unistd.h>
 #include <fcntl.h>
-#else
-#include <time.h>
 #endif
 
+#include <time.h>
+
 #include "rand_xor.h"
 
 /* Super fast random number generator.
@@ -57,10 +58,14 @@ rand_xorshift128plus(uint64_t seed[2])
 void
 s_rand_xorshift128plus(uint64_t seed[2], bool randomised_seed)
 {
-   if (!randomised_seed)
-      goto fixed_seed;
+   if (!randomised_seed) {
+      /* Use a fixed seed */
+      seed[0] = 0x3bffb83978e24f88;
+      seed[1] = 0x9238d5d56c71cd35;
+      return;
+   }
 
-#if defined(__linux__)
+#if !DETECT_OS_WINDOWS
    size_t seed_size = sizeof(uint64_t) * 2;
 
 #if defined(HAVE_GETRANDOM)
@@ -70,27 +75,15 @@ s_rand_xorshift128plus(uint64_t seed[2], bool randomised_seed)
 #endif
 
    int fd = open("/dev/urandom", O_RDONLY);
-   if (fd < 0)
-      goto fixed_seed;
-
-   if (read(fd, seed, seed_size) != seed_size) {
+   if (fd >= 0) {
+      if (read(fd, seed, seed_size) == seed_size) {
+         close(fd);
+         return;
+      }
       close(fd);
-      goto fixed_seed;
    }
-
-   close(fd);
-   return;
-
-#else
-   seed[0] = 0x3bffb83978e24f88;
-   seed[1] = time(NULL);
-
-   return;
 #endif
 
-fixed_seed:
-
-   /* Fallback to a fixed seed */
    seed[0] = 0x3bffb83978e24f88;
-   seed[1] = 0x9238d5d56c71cd35;
+   seed[1] = time(NULL);
 }