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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
#include "liquid.h"
#include "resource_limits.h"
VALUE cLiquidResourceLimits;
static void resource_limits_free(void *ptr)
{
resource_limits_t *resource_limits = ptr;
xfree(resource_limits);
}
static size_t resource_limits_memsize(const void *ptr)
{
return sizeof(resource_limits_t);
}
const rb_data_type_t resource_limits_data_type = {
"liquid_resource_limits",
{ NULL, resource_limits_free, resource_limits_memsize },
NULL, NULL, RUBY_TYPED_FREE_IMMEDIATELY
};
static void resource_limits_reset(resource_limits_t *resource_limit)
{
resource_limit->reached_limit = true;
resource_limit->last_capture_length = -1;
resource_limit->render_score = 0;
resource_limit->assign_score = 0;
}
static VALUE resource_limits_allocate(VALUE klass)
{
resource_limits_t *resource_limits;
VALUE obj = TypedData_Make_Struct(klass, resource_limits_t, &resource_limits_data_type, resource_limits);
resource_limits_reset(resource_limits);
return obj;
}
static VALUE resource_limits_render_length_limit_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
return LONG2NUM(resource_limits->render_length_limit);
}
static VALUE resource_limits_set_render_length_limit_method(VALUE self, VALUE render_length_limit)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
if (render_length_limit == Qnil) {
resource_limits->render_length_limit = LONG_MAX;
} else {
resource_limits->render_length_limit = NUM2LONG(render_length_limit);
}
return Qnil;
}
static VALUE resource_limits_render_score_limit_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
return LONG2NUM(resource_limits->render_score_limit);
}
static VALUE resource_limits_set_render_score_limit_method(VALUE self, VALUE render_score_limit)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
if (render_score_limit == Qnil) {
resource_limits->render_score_limit = LONG_MAX;
} else {
resource_limits->render_score_limit = NUM2LONG(render_score_limit);
}
return Qnil;
}
static VALUE resource_limits_assign_score_limit_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
return LONG2NUM(resource_limits->assign_score_limit);
}
static VALUE resource_limits_set_assign_score_limit_method(VALUE self, VALUE assign_score_limit)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
if (assign_score_limit == Qnil) {
resource_limits->assign_score_limit = LONG_MAX;
} else {
resource_limits->assign_score_limit = NUM2LONG(assign_score_limit);
}
return Qnil;
}
static VALUE resource_limits_render_score_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
return LONG2NUM(resource_limits->render_score);
}
static VALUE resource_limits_assign_score_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
return LONG2NUM(resource_limits->assign_score);
}
static VALUE resource_limits_initialize_method(VALUE self, VALUE render_length_limit,
VALUE render_score_limit, VALUE assign_score_limit)
{
resource_limits_set_render_length_limit_method(self, render_length_limit);
resource_limits_set_render_score_limit_method(self, render_score_limit);
resource_limits_set_assign_score_limit_method(self, assign_score_limit);
return Qnil;
}
__attribute__((noreturn))
void resource_limits_raise_limits_reached(resource_limits_t *resource_limit)
{
resource_limit->reached_limit = true;
rb_raise(cMemoryError, "Memory limits exceeded");
}
void resource_limits_increment_render_score(resource_limits_t *resource_limits, long amount)
{
resource_limits->render_score = resource_limits->render_score + amount;
if (resource_limits->render_score > resource_limits->render_score_limit) {
resource_limits_raise_limits_reached(resource_limits);
}
}
static VALUE resource_limits_increment_render_score_method(VALUE self, VALUE amount)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
resource_limits_increment_render_score(resource_limits, NUM2LONG(amount));
return Qnil;
}
static void resource_limits_increment_assign_score(resource_limits_t *resource_limits, long amount)
{
resource_limits->assign_score = resource_limits->assign_score + amount;
if (resource_limits->assign_score > resource_limits->assign_score_limit) {
resource_limits_raise_limits_reached(resource_limits);
}
}
static VALUE resource_limits_increment_assign_score_method(VALUE self, VALUE amount)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
resource_limits_increment_assign_score(resource_limits, NUM2LONG(amount));
return Qnil;
}
void resource_limits_increment_write_score(resource_limits_t *resource_limits, VALUE output)
{
long captured = RSTRING_LEN(output);
if (resource_limits->last_capture_length >= 0) {
long increment = captured - resource_limits->last_capture_length;
resource_limits->last_capture_length = captured;
resource_limits_increment_assign_score(resource_limits, increment);
} else if (captured > resource_limits->render_length_limit) {
resource_limits_raise_limits_reached(resource_limits);
}
}
static VALUE resource_limits_increment_write_score_method(VALUE self, VALUE output)
{
Check_Type(output, T_STRING);
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
resource_limits_increment_write_score(resource_limits, output);
return Qnil;
}
static VALUE resource_limits_raise_limits_reached_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
resource_limits_raise_limits_reached(resource_limits);
}
static VALUE resource_limits_reached_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
return resource_limits->reached_limit ? Qtrue : Qfalse;
}
struct capture_ensure_t {
resource_limits_t *resource_limits;
long old_capture_length;
};
static VALUE capture_ensure(VALUE data)
{
struct capture_ensure_t *ensure_data = (struct capture_ensure_t *)data;
ensure_data->resource_limits->last_capture_length = ensure_data->old_capture_length;
return Qnil;
}
static VALUE resource_limits_with_capture_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
struct capture_ensure_t ensure_data = {
.resource_limits = resource_limits,
.old_capture_length = resource_limits->last_capture_length
};
resource_limits->last_capture_length = 0;
return rb_ensure(rb_yield, Qundef, capture_ensure, (VALUE)&ensure_data);
}
static VALUE resource_limits_reset_method(VALUE self)
{
resource_limits_t *resource_limits;
ResourceLimits_Get_Struct(self, resource_limits);
resource_limits_reset(resource_limits);
return Qnil;
}
void liquid_define_resource_limits(void)
{
cLiquidResourceLimits = rb_define_class_under(mLiquidC, "ResourceLimits", rb_cObject);
rb_global_variable(&cLiquidResourceLimits);
rb_define_alloc_func(cLiquidResourceLimits, resource_limits_allocate);
rb_define_method(cLiquidResourceLimits, "initialize", resource_limits_initialize_method, 3);
rb_define_method(cLiquidResourceLimits, "render_length_limit", resource_limits_render_length_limit_method, 0);
rb_define_method(cLiquidResourceLimits, "render_length_limit=", resource_limits_set_render_length_limit_method, 1);
rb_define_method(cLiquidResourceLimits, "render_score_limit", resource_limits_render_score_limit_method, 0);
rb_define_method(cLiquidResourceLimits, "render_score_limit=", resource_limits_set_render_score_limit_method, 1);
rb_define_method(cLiquidResourceLimits, "assign_score_limit", resource_limits_assign_score_limit_method, 0);
rb_define_method(cLiquidResourceLimits, "assign_score_limit=", resource_limits_set_assign_score_limit_method, 1);
rb_define_method(cLiquidResourceLimits, "render_score", resource_limits_render_score_method, 0);
rb_define_method(cLiquidResourceLimits, "assign_score", resource_limits_assign_score_method, 0);
rb_define_method(cLiquidResourceLimits, "increment_render_score", resource_limits_increment_render_score_method, 1);
rb_define_method(cLiquidResourceLimits, "increment_assign_score", resource_limits_increment_assign_score_method, 1);
rb_define_method(cLiquidResourceLimits, "increment_write_score", resource_limits_increment_write_score_method, 1);
rb_define_method(cLiquidResourceLimits, "raise_limits_reached", resource_limits_raise_limits_reached_method, 0);
rb_define_method(cLiquidResourceLimits, "reached?", resource_limits_reached_method, 0);
rb_define_method(cLiquidResourceLimits, "reset", resource_limits_reset_method, 0);
rb_define_method(cLiquidResourceLimits, "with_capture", resource_limits_with_capture_method, 0);
}
|
