1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
#include "config.h"
#include <cassert>
#include <functional>
#include <limits>
#include <memory>
#include <stdexcept>
#include <utility>
#include "async_event.h"
#include "context.h"
#include "device.h"
#include "effectslot.h"
#include "logging.h"
#include "ringbuffer.h"
#include "voice.h"
#include "voice_change.h"
#ifdef __cpp_lib_atomic_is_always_lock_free
static_assert(std::atomic<ContextBase::AsyncEventBitset>::is_always_lock_free, "atomic<bitset> isn't lock-free");
#endif
ContextBase::ContextBase(DeviceBase *device) : mDevice{device}
{ assert(mEnabledEvts.is_lock_free()); }
ContextBase::~ContextBase()
{
if(std::unique_ptr<EffectSlotArray> curarray{mActiveAuxSlots.exchange(nullptr, std::memory_order_relaxed)})
std::destroy_n(curarray->end(), curarray->size());
mVoices.store(nullptr, std::memory_order_relaxed);
if(mAsyncEvents)
{
size_t count{0};
auto evt_vec = mAsyncEvents->getReadVector();
if(evt_vec.first.len > 0)
{
std::destroy_n(std::launder(reinterpret_cast<AsyncEvent*>(evt_vec.first.buf)),
evt_vec.first.len);
count += evt_vec.first.len;
}
if(evt_vec.second.len > 0)
{
std::destroy_n(std::launder(reinterpret_cast<AsyncEvent*>(evt_vec.second.buf)),
evt_vec.second.len);
count += evt_vec.second.len;
}
if(count > 0)
TRACE("Destructed %zu orphaned event%s\n", count, (count==1)?"":"s");
mAsyncEvents->readAdvance(count);
}
}
void ContextBase::allocVoiceChanges()
{
static constexpr size_t clustersize{std::tuple_size_v<VoiceChangeCluster::element_type>};
VoiceChangeCluster clusterptr{std::make_unique<VoiceChangeCluster::element_type>()};
const auto cluster = al::span{*clusterptr};
for(size_t i{1};i < clustersize;++i)
cluster[i-1].mNext.store(std::addressof(cluster[i]), std::memory_order_relaxed);
cluster[clustersize-1].mNext.store(mVoiceChangeTail, std::memory_order_relaxed);
mVoiceChangeClusters.emplace_back(std::move(clusterptr));
mVoiceChangeTail = mVoiceChangeClusters.back()->data();
}
void ContextBase::allocVoiceProps()
{
static constexpr size_t clustersize{std::tuple_size_v<VoicePropsCluster::element_type>};
TRACE("Increasing allocated voice properties to %zu\n",
(mVoicePropClusters.size()+1) * clustersize);
auto clusterptr = std::make_unique<VoicePropsCluster::element_type>();
auto cluster = al::span{*clusterptr};
for(size_t i{1};i < clustersize;++i)
cluster[i-1].next.store(std::addressof(cluster[i]), std::memory_order_relaxed);
mVoicePropClusters.emplace_back(std::move(clusterptr));
VoicePropsItem *oldhead{mFreeVoiceProps.load(std::memory_order_acquire)};
do {
mVoicePropClusters.back()->back().next.store(oldhead, std::memory_order_relaxed);
} while(mFreeVoiceProps.compare_exchange_weak(oldhead, mVoicePropClusters.back()->data(),
std::memory_order_acq_rel, std::memory_order_acquire) == false);
}
void ContextBase::allocVoices(size_t addcount)
{
static constexpr size_t clustersize{std::tuple_size_v<VoiceCluster::element_type>};
/* Convert element count to cluster count. */
addcount = (addcount+(clustersize-1)) / clustersize;
if(!addcount)
{
if(!mVoiceClusters.empty())
return;
++addcount;
}
if(addcount >= std::numeric_limits<int>::max()/clustersize - mVoiceClusters.size())
throw std::runtime_error{"Allocating too many voices"};
const size_t totalcount{(mVoiceClusters.size()+addcount) * clustersize};
TRACE("Increasing allocated voices to %zu\n", totalcount);
while(addcount)
{
mVoiceClusters.emplace_back(std::make_unique<VoiceCluster::element_type>());
--addcount;
}
auto newarray = VoiceArray::Create(totalcount);
auto voice_iter = newarray->begin();
for(VoiceCluster &cluster : mVoiceClusters)
voice_iter = std::transform(cluster->begin(), cluster->end(), voice_iter,
[](Voice &voice) noexcept -> Voice* { return &voice; });
if(auto oldvoices = mVoices.exchange(std::move(newarray), std::memory_order_acq_rel))
std::ignore = mDevice->waitForMix();
}
void ContextBase::allocEffectSlotProps()
{
static constexpr size_t clustersize{std::tuple_size_v<EffectSlotPropsCluster::element_type>};
TRACE("Increasing allocated effect slot properties to %zu\n",
(mEffectSlotPropClusters.size()+1) * clustersize);
auto clusterptr = std::make_unique<EffectSlotPropsCluster::element_type>();
auto cluster = al::span{*clusterptr};
for(size_t i{1};i < clustersize;++i)
cluster[i-1].next.store(std::addressof(cluster[i]), std::memory_order_relaxed);
auto *newcluster = mEffectSlotPropClusters.emplace_back(std::move(clusterptr)).get();
EffectSlotProps *oldhead{mFreeEffectSlotProps.load(std::memory_order_acquire)};
do {
newcluster->back().next.store(oldhead, std::memory_order_relaxed);
} while(mFreeEffectSlotProps.compare_exchange_weak(oldhead, newcluster->data(),
std::memory_order_acq_rel, std::memory_order_acquire) == false);
}
EffectSlot *ContextBase::getEffectSlot()
{
for(auto& clusterptr : mEffectSlotClusters)
{
const auto cluster = al::span{*clusterptr};
auto iter = std::find_if_not(cluster.begin(), cluster.end(),
std::mem_fn(&EffectSlot::InUse));
if(iter != cluster.end()) return al::to_address(iter);
}
auto clusterptr = std::make_unique<EffectSlotCluster::element_type>();
if(1 >= std::numeric_limits<int>::max()/clusterptr->size() - mEffectSlotClusters.size())
throw std::runtime_error{"Allocating too many effect slots"};
const size_t totalcount{(mEffectSlotClusters.size()+1) * clusterptr->size()};
TRACE("Increasing allocated effect slots to %zu\n", totalcount);
mEffectSlotClusters.emplace_back(std::move(clusterptr));
return mEffectSlotClusters.back()->data();
}
void ContextBase::allocContextProps()
{
static constexpr size_t clustersize{std::tuple_size_v<ContextPropsCluster::element_type>};
TRACE("Increasing allocated context properties to %zu\n",
(mContextPropClusters.size()+1) * clustersize);
auto clusterptr = std::make_unique<ContextPropsCluster::element_type>();
auto cluster = al::span{*clusterptr};
for(size_t i{1};i < clustersize;++i)
cluster[i-1].next.store(std::addressof(cluster[i]), std::memory_order_relaxed);
auto *newcluster = mContextPropClusters.emplace_back(std::move(clusterptr)).get();
ContextProps *oldhead{mFreeContextProps.load(std::memory_order_acquire)};
do {
newcluster->back().next.store(oldhead, std::memory_order_relaxed);
} while(mFreeContextProps.compare_exchange_weak(oldhead, newcluster->data(),
std::memory_order_acq_rel, std::memory_order_acquire) == false);
}
|
