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-rw-r--r--src/environment.cpp37
-rw-r--r--src/environment.h24
-rw-r--r--src/threading/atomic.h64
3 files changed, 77 insertions, 48 deletions
diff --git a/src/environment.cpp b/src/environment.cpp
index 2a42f18ad..76b7ec1e0 100644
--- a/src/environment.cpp
+++ b/src/environment.cpp
@@ -49,11 +49,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
Environment::Environment():
+ m_time_of_day_speed(0),
m_time_of_day(9000),
m_time_of_day_f(9000./24000),
- m_time_of_day_speed(0),
- m_time_conversion_skew(0),
- m_day_night_ratio_override_storage(0)
+ m_time_conversion_skew(0.0f),
+ m_enable_day_night_ratio_override(false),
+ m_day_night_ratio_override(0.0f)
{
m_cache_enable_shaders = g_settings->getBool("enable_shaders");
}
@@ -179,10 +180,9 @@ std::vector<Player*> Environment::getPlayers(bool ignore_disconnected)
u32 Environment::getDayNightRatio()
{
- u64 day_night_st = m_day_night_ratio_override_storage;
- if (day_night_st & ((u64)1 << 63))
- return day_night_st & U32_MAX;
- MutexAutoLock lock(this->m_time_floats_lock);
+ MutexAutoLock lock(this->m_time_lock);
+ if (m_enable_day_night_ratio_override)
+ return m_day_night_ratio_override;
return time_to_daynight_ratio(m_time_of_day_f * 24000, m_cache_enable_shaders);
}
@@ -196,29 +196,38 @@ float Environment::getTimeOfDaySpeed()
return m_time_of_day_speed;
}
+void Environment::setDayNightRatioOverride(bool enable, u32 value)
+{
+ MutexAutoLock lock(this->m_time_lock);
+ m_enable_day_night_ratio_override = enable;
+ m_day_night_ratio_override = value;
+}
+
void Environment::setTimeOfDay(u32 time)
{
- MutexAutoLock lock(this->m_time_floats_lock);
+ MutexAutoLock lock(this->m_time_lock);
m_time_of_day = time;
m_time_of_day_f = (float)time / 24000.0;
}
u32 Environment::getTimeOfDay()
{
+ MutexAutoLock lock(this->m_time_lock);
return m_time_of_day;
}
float Environment::getTimeOfDayF()
{
- MutexAutoLock lock(this->m_time_floats_lock);
+ MutexAutoLock lock(this->m_time_lock);
return m_time_of_day_f;
}
void Environment::stepTimeOfDay(float dtime)
{
- MutexAutoLock lock(this->m_time_floats_lock);
+ MutexAutoLock lock(this->m_time_lock);
f32 speed = m_time_of_day_speed * 24000. / (24. * 3600);
- u32 units = (u32)((dtime + m_time_conversion_skew) * speed);
+ m_time_conversion_skew += dtime;
+ u32 units = (u32)(m_time_conversion_skew * speed);
bool sync_f = false;
if (units > 0) {
// Sync at overflow
@@ -232,7 +241,7 @@ void Environment::stepTimeOfDay(float dtime)
m_time_conversion_skew -= (f32)units / speed;
}
if (!sync_f) {
- m_time_of_day_f += m_time_of_day_speed / (24. * 3600.) * dtime;
+ m_time_of_day_f += speed * dtime;
if (m_time_of_day_f > 1.0)
m_time_of_day_f -= 1.0;
if (m_time_of_day_f < 0.0)
@@ -527,10 +536,10 @@ void ServerEnvironment::loadMeta()
}
try {
- m_time_of_day = args.getU64("time_of_day");
+ setTimeOfDay(args.getU64("time_of_day"));
} catch (SettingNotFoundException &e) {
// This is not as important
- m_time_of_day = 9000;
+ setTimeOfDay(9000);
}
}
diff --git a/src/environment.h b/src/environment.h
index 7100bc5d3..1aaa5091f 100644
--- a/src/environment.h
+++ b/src/environment.h
@@ -93,10 +93,7 @@ public:
void setTimeOfDaySpeed(float speed);
float getTimeOfDaySpeed();
- void setDayNightRatioOverride(bool enable, u32 value)
- {
- m_day_night_ratio_override_storage = value | ((u64)enable << 63);
- }
+ void setDayNightRatioOverride(bool enable, u32 value);
// counter used internally when triggering ABMs
u32 m_added_objects;
@@ -105,26 +102,25 @@ protected:
// peer_ids in here should be unique, except that there may be many 0s
std::vector<Player*> m_players;
- // Time of day in milli-hours (0-23999); determines day and night
- Atomic<u32> m_time_of_day;
+ GenericAtomic<float> m_time_of_day_speed;
/*
- * Below: values managed by m_time_floats_lock
+ * Below: values managed by m_time_lock
*/
+ // Time of day in milli-hours (0-23999); determines day and night
+ u32 m_time_of_day;
// Time of day in 0...1
float m_time_of_day_f;
- float m_time_of_day_speed;
// Stores the skew created by the float -> u32 conversion
// to be applied at next conversion, so that there is no real skew.
float m_time_conversion_skew;
+ // Overriding the day-night ratio is useful for custom sky visuals
+ bool m_enable_day_night_ratio_override;
+ u32 m_day_night_ratio_override;
/*
- * Above: values managed by m_time_floats_lock
+ * Above: values managed by m_time_lock
*/
- // Overriding the day-night ratio is useful for custom sky visuals
- // lowest 32 bits store the overriden ratio, highest bit stores whether its enabled
- Atomic<u64> m_day_night_ratio_override_storage;
-
/* TODO: Add a callback function so these can be updated when a setting
* changes. At this point in time it doesn't matter (e.g. /set
* is documented to change server settings only)
@@ -137,7 +133,7 @@ protected:
bool m_cache_enable_shaders;
private:
- Mutex m_time_floats_lock;
+ Mutex m_time_lock;
DISABLE_CLASS_COPY(Environment);
};
diff --git a/src/threading/atomic.h b/src/threading/atomic.h
index 9cf50a821..c9a454f20 100644
--- a/src/threading/atomic.h
+++ b/src/threading/atomic.h
@@ -24,19 +24,25 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#if __cplusplus >= 201103L
#include <atomic>
template<typename T> using Atomic = std::atomic<T>;
+ template<typename T> using GenericAtomic = std::atomic<T>;
#else
#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
#define CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
#if GCC_VERSION >= 407 || CLANG_VERSION >= 302
+ #define ATOMIC_LOAD_GENERIC(T, v) do { \
+ T _val; \
+ __atomic_load(&(v), &(_val), __ATOMIC_SEQ_CST); \
+ return _val; \
+ } while(0)
#define ATOMIC_LOAD(T, v) return __atomic_load_n (&(v), __ATOMIC_SEQ_CST)
#define ATOMIC_STORE(T, v, x) __atomic_store (&(v), &(x), __ATOMIC_SEQ_CST); return x
- #define ATOMIC_EXCHANGE(T, v, x) return __atomic_exchange_n(&(v), (x), __ATOMIC_SEQ_CST)
+ #define ATOMIC_EXCHANGE(T, v, x) return __atomic_exchange (&(v), &(x), __ATOMIC_SEQ_CST)
#define ATOMIC_ADD_EQ(T, v, x) return __atomic_add_fetch (&(v), (x), __ATOMIC_SEQ_CST)
#define ATOMIC_SUB_EQ(T, v, x) return __atomic_sub_fetch (&(v), (x), __ATOMIC_SEQ_CST)
#define ATOMIC_POST_INC(T, v) return __atomic_fetch_add (&(v), 1, __ATOMIC_SEQ_CST)
#define ATOMIC_POST_DEC(T, v) return __atomic_fetch_sub (&(v), 1, __ATOMIC_SEQ_CST)
- #define ATOMIC_CAS(T, v, e, d) return __atomic_compare_exchange_n(&(v), &(e), (d), \
+ #define ATOMIC_CAS(T, v, e, d) return __atomic_compare_exchange(&(v), &(e), &(d), \
false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
#else
#define ATOMIC_USE_LOCK
@@ -56,12 +62,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
m_mutex.unlock(); \
return _eq; \
} while (0)
- #define ATOMIC_LOAD(T, v) \
- if (sizeof(T) <= sizeof(void*)) return v; \
- else ATOMIC_LOCK_OP(T, v);
- #define ATOMIC_STORE(T, v, x) \
- if (sizeof(T) <= sizeof(void*)) return v = x; \
- else ATOMIC_LOCK_OP(T, v = x);
+ #define ATOMIC_LOAD(T, v) ATOMIC_LOCK_OP(T, v)
+ #define ATOMIC_LOAD_GENERIC(T, v) ATOMIC_LOAD(T, v)
+ #define ATOMIC_STORE(T, v, x) ATOMIC_LOCK_OP(T, v = x)
#define ATOMIC_EXCHANGE(T, v, x) do { \
m_mutex.lock(); \
T _val = v; \
@@ -84,32 +87,53 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#endif
#endif
-
+// For usage with integral types.
template<typename T>
class Atomic {
public:
- Atomic(const T &v = 0) : val(v) {}
+ Atomic(const T &v = 0) : m_val(v) {}
- operator T () { ATOMIC_LOAD(T, val); }
+ operator T () { ATOMIC_LOAD(T, m_val); }
- T exchange(T x) { ATOMIC_EXCHANGE(T, val, x); }
- bool compare_exchange_strong(T &expected, T desired) { ATOMIC_CAS(T, val, expected, desired); }
+ T exchange(T x) { ATOMIC_EXCHANGE(T, m_val, x); }
+ bool compare_exchange_strong(T &expected, T desired) { ATOMIC_CAS(T, m_val, expected, desired); }
- T operator = (T x) { ATOMIC_STORE(T, val, x); }
- T operator += (T x) { ATOMIC_ADD_EQ(T, val, x); }
- T operator -= (T x) { ATOMIC_SUB_EQ(T, val, x); }
+ T operator = (T x) { ATOMIC_STORE(T, m_val, x); }
+ T operator += (T x) { ATOMIC_ADD_EQ(T, m_val, x); }
+ T operator -= (T x) { ATOMIC_SUB_EQ(T, m_val, x); }
T operator ++ () { return *this += 1; }
T operator -- () { return *this -= 1; }
- T operator ++ (int) { ATOMIC_POST_INC(T, val); }
- T operator -- (int) { ATOMIC_POST_DEC(T, val); }
+ T operator ++ (int) { ATOMIC_POST_INC(T, m_val); }
+ T operator -- (int) { ATOMIC_POST_DEC(T, m_val); }
private:
- T val;
+ T m_val;
#ifdef ATOMIC_USE_LOCK
Mutex m_mutex;
#endif
};
-#endif // C++11
+// For usage with non-integral types like float for example.
+// Needed because the other operations aren't provided by gcc
+// for non-integral types:
+// https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/_005f_005fatomic-Builtins.html
+template<typename T>
+class GenericAtomic {
+public:
+ GenericAtomic(const T &v = 0) : m_val(v) {}
+ operator T () { ATOMIC_LOAD_GENERIC(T, m_val); }
+
+ T exchange(T x) { ATOMIC_EXCHANGE(T, m_val, x); }
+ bool compare_exchange_strong(T &expected, T desired) { ATOMIC_CAS(T, m_val, expected, desired); }
+
+ T operator = (T x) { ATOMIC_STORE(T, m_val, x); }
+private:
+ T m_val;
+#ifdef ATOMIC_USE_LOCK
+ Mutex m_mutex;
#endif
+};
+#endif // C++11
+
+#endif
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