1 //
2 // Copyright 2012 Francisco Jerez
3 //
4 // Permission is hereby granted, free of charge, to any person obtaining a
5 // copy of this software and associated documentation files (the "Software"),
6 // to deal in the Software without restriction, including without limitation
7 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 // and/or sell copies of the Software, and to permit persons to whom the
9 // Software is furnished to do so, subject to the following conditions:
10 //
11 // The above copyright notice and this permission notice shall be included in
12 // all copies or substantial portions of the Software.
13 //
14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 // OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 // OTHER DEALINGS IN THE SOFTWARE.
21 //
22
23 #include "core/context.hpp"
24
25 using namespace clover;
26
context(const property_list & props,const ref_vector<device> & devs,const notify_action & notify)27 context::context(const property_list &props,
28 const ref_vector<device> &devs,
29 const notify_action ¬ify) :
30 notify(notify), props(props), devs(devs) {
31 }
32
~context()33 context::~context() {
34 while (_destroy_notify.size()) {
35 _destroy_notify.top()();
36 _destroy_notify.pop();
37 }
38 }
39
40 bool
operator ==(const context & ctx) const41 context::operator==(const context &ctx) const {
42 return this == &ctx;
43 }
44
45 bool
operator !=(const context & ctx) const46 context::operator!=(const context &ctx) const {
47 return this != &ctx;
48 }
49
50 void
destroy_notify(std::function<void ()> f)51 context::destroy_notify(std::function<void ()> f) {
52 _destroy_notify.push(f);
53 }
54
55 const context::property_list &
properties() const56 context::properties() const {
57 return props;
58 }
59
60 context::device_range
devices() const61 context::devices() const {
62 return map(evals(), devs);
63 }
64
65 void
add_svm_allocation(const void * ptr,size_t size)66 context::add_svm_allocation(const void *ptr, size_t size) {
67 svm_ptrs.emplace(ptr, size);
68 }
69
70 void
remove_svm_allocation(const void * ptr)71 context::remove_svm_allocation(const void *ptr) {
72 svm_ptrs.erase(ptr);
73 }
74
75 context::svm_pointer_map::value_type
find_svm_allocation(const void * ptr) const76 context::find_svm_allocation(const void *ptr) const {
77 // std::prev on an iterator of an empty container causes SIGSEGVs
78 if (svm_ptrs.empty())
79 return { nullptr, 0 };
80
81 auto it = std::prev(svm_ptrs.upper_bound(ptr));
82 if (it == svm_ptrs.end())
83 return { nullptr, 0 };
84
85 uintptr_t base = reinterpret_cast<uintptr_t>((*it).first);
86 uintptr_t end = (*it).second + base;
87 uintptr_t ptrv = reinterpret_cast<uintptr_t>(ptr);
88 if (ptrv >= base && ptrv < end)
89 return *it;
90
91 return { nullptr, 0 };
92 }
93