5 files changed, 58 insertions, 9 deletions

diff --git a/src/common/common_funcs.h b/src/common/common_funcs.h
index 98421bced..367b6bf6e 100644
--- a/src/common/common_funcs.h
+++ b/src/common/common_funcs.h
@@ -64,14 +64,20 @@ __declspec(dllimport) void __stdcall DebugBreak(void);
         using T = std::underlying_type_t<type>;                                                    \
         return static_cast<type>(static_cast<T>(a) & static_cast<T>(b));                           \
     }                                                                                              \
-    constexpr type& operator|=(type& a, type b) noexcept {                                         \
+    [[nodiscard]] constexpr type operator^(type a, type b) noexcept {                              \
         using T = std::underlying_type_t<type>;                                                    \
-        a = static_cast<type>(static_cast<T>(a) | static_cast<T>(b));                              \
+        return static_cast<type>(static_cast<T>(a) ^ static_cast<T>(b));                           \
+    }                                                                                              \
+    constexpr type& operator|=(type& a, type b) noexcept {                                         \
+        a = a | b;                                                                                 \
         return a;                                                                                  \
     }                                                                                              \
     constexpr type& operator&=(type& a, type b) noexcept {                                         \
-        using T = std::underlying_type_t<type>;                                                    \
-        a = static_cast<type>(static_cast<T>(a) & static_cast<T>(b));                              \
+        a = a & b;                                                                                 \
+        return a;                                                                                  \
+    }                                                                                              \
+    constexpr type& operator^=(type& a, type b) noexcept {                                         \
+        a = a ^ b;                                                                                 \
         return a;                                                                                  \
     }                                                                                              \
     [[nodiscard]] constexpr type operator~(type key) noexcept {                                    \
diff --git a/src/common/math_util.h b/src/common/math_util.h
index cc35c90ee..b35ad8507 100644
--- a/src/common/math_util.h
+++ b/src/common/math_util.h
@@ -9,7 +9,7 @@
 
 namespace Common {
 
-constexpr float PI = 3.14159265f;
+constexpr float PI = 3.1415926535f;
 
 template <class T>
 struct Rectangle {
diff --git a/src/common/quaternion.h b/src/common/quaternion.h
index da44f35cd..4d0871eb4 100644
--- a/src/common/quaternion.h
+++ b/src/common/quaternion.h
@@ -36,6 +36,36 @@ public:
         T length = std::sqrt(xyz.Length2() + w * w);
         return {xyz / length, w / length};
     }
+
+    [[nodiscard]] std::array<decltype(-T{}), 16> ToMatrix() const {
+        const T x2 = xyz[0] * xyz[0];
+        const T y2 = xyz[1] * xyz[1];
+        const T z2 = xyz[2] * xyz[2];
+
+        const T xy = xyz[0] * xyz[1];
+        const T wz = w * xyz[2];
+        const T xz = xyz[0] * xyz[2];
+        const T wy = w * xyz[1];
+        const T yz = xyz[1] * xyz[2];
+        const T wx = w * xyz[0];
+
+        return {1.0f - 2.0f * (y2 + z2),
+                2.0f * (xy + wz),
+                2.0f * (xz - wy),
+                0.0f,
+                2.0f * (xy - wz),
+                1.0f - 2.0f * (x2 + z2),
+                2.0f * (yz + wx),
+                0.0f,
+                2.0f * (xz + wy),
+                2.0f * (yz - wx),
+                1.0f - 2.0f * (x2 + y2),
+                0.0f,
+                0.0f,
+                0.0f,
+                0.0f,
+                1.0f};
+    }
 };
 
 template <typename T>
diff --git a/src/common/thread.cpp b/src/common/thread.cpp
index 8e5935e6a..d2c1ac60d 100644
--- a/src/common/thread.cpp
+++ b/src/common/thread.cpp
@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/common_funcs.h"
+#include "common/logging/log.h"
 #include "common/thread.h"
 #ifdef __APPLE__
 #include <mach/mach.h>
@@ -19,6 +21,8 @@
 #include <unistd.h>
 #endif
 
+#include <string>
+
 #ifdef __FreeBSD__
 #define cpu_set_t cpuset_t
 #endif
@@ -110,6 +114,14 @@ void SetCurrentThreadName(const char* name) {
     pthread_set_name_np(pthread_self(), name);
 #elif defined(__NetBSD__)
     pthread_setname_np(pthread_self(), "%s", (void*)name);
+#elif defined(__linux__)
+    // Linux limits thread names to 15 characters and will outright reject any
+    // attempt to set a longer name with ERANGE.
+    std::string truncated(name, std::min(strlen(name), static_cast<size_t>(15)));
+    if (int e = pthread_setname_np(pthread_self(), truncated.c_str())) {
+        errno = e;
+        LOG_ERROR(Common, "Failed to set thread name to '{}': {}", truncated, GetLastErrorMsg());
+    }
 #else
     pthread_setname_np(pthread_self(), name);
 #endif
diff --git a/src/common/thread.h b/src/common/thread.h
index 52b359413..a8c17c71a 100644
--- a/src/common/thread.h
+++ b/src/common/thread.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <atomic>
 #include <chrono>
 #include <condition_variable>
 #include <cstddef>
@@ -25,13 +26,13 @@ public:
 
     void Wait() {
         std::unique_lock lk{mutex};
-        condvar.wait(lk, [&] { return is_set; });
+        condvar.wait(lk, [&] { return is_set.load(); });
         is_set = false;
     }
 
     bool WaitFor(const std::chrono::nanoseconds& time) {
         std::unique_lock lk{mutex};
-        if (!condvar.wait_for(lk, time, [this] { return is_set; }))
+        if (!condvar.wait_for(lk, time, [this] { return is_set.load(); }))
             return false;
         is_set = false;
         return true;
@@ -40,7 +41,7 @@ public:
     template <class Clock, class Duration>
     bool WaitUntil(const std::chrono::time_point<Clock, Duration>& time) {
         std::unique_lock lk{mutex};
-        if (!condvar.wait_until(lk, time, [this] { return is_set; }))
+        if (!condvar.wait_until(lk, time, [this] { return is_set.load(); }))
             return false;
         is_set = false;
         return true;
@@ -54,9 +55,9 @@ public:
     }
 
 private:
-    bool is_set = false;
     std::condition_variable condvar;
     std::mutex mutex;
+    std::atomic_bool is_set{false};
 };
 
 class Barrier {