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using memory mapping for writing at first place would require too much io,

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every written page would have to be paged in first from disk, use a dedicaed write buffers for this
(not completely finished)
This commit is contained in:
Christian Thaeter 2007-08-21 04:06:23 +02:00
parent dd276a9057
commit 1b49f7163c
3 changed files with 131 additions and 54 deletions
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18
uml/cinelerra3/10.session
View file

@ -1,18 +0,0 @@
window_sizes 1274 775 300 964 633 60
diagrams
active classdiagram_ref 128181 // File Mapping
964 633 68 4 0 0
end
show_stereotypes
open
package_ref 128645 // codegen
package_ref 129285 // ProcessingLayer
class_ref 128181 // File
class_ref 128693 // FileHandle
class_ref 129333 // FileProvider
class_ref 128225 // FrameReference
class_ref 128778 // FileReference
end
end

81
uml/cinelerra3/128138
View file

@ -1,6 +1,6 @@
format 38
format 40
"design" // BackendLayer::design
revision 6
revision 8
modified_by 10 "ct"
// class settings
//class diagram settings
@ -8,7 +8,7 @@ format 38
//use case diagram settings
package_name_in_tab default show_context default auto_label_position default draw_all_relations default shadow default
//sequence diagram settings
show_full_operations_definition default write_horizontally default drawing_language default draw_all_relations default shadow default
show_full_operations_definition default write_horizontally default class_drawing_mode default drawing_language default draw_all_relations default shadow default
//collaboration diagram settings
show_full_operations_definition default show_hierarchical_rank default write_horizontally default drawing_language default package_name_in_tab default show_context default draw_all_relations default shadow default
//object diagram settings
@ -34,7 +34,7 @@ format 38
//object diagram settings
write_horizontally default package_name_in_tab default show_context default auto_label_position default draw_all_relations default shadow default
//sequence diagram settings
show_full_operations_definition default write_horizontally default drawing_language default draw_all_relations default shadow default
show_full_operations_definition default write_horizontally default class_drawing_mode default drawing_language default draw_all_relations default shadow default
//state diagram settings
package_name_in_tab default show_context default auto_label_position default write_trans_label_horizontally default show_trans_definition default draw_all_relations default shadow default
show_activities default region_horizontally default drawing_language default
@ -305,6 +305,22 @@ ${inlines}
classrelation 128522 // mapping (<aggregation>)
relation_ref 128266 // <aggregation>
end
classrelation 129674 // <aggregation>
relation 129290 o---
a role_name "" multiplicity "" protected
cpp default " ${comment}${static}${mutable}${volatile}${const}${type}* ${name}${value};
"
classrelation_ref 129674 // <aggregation>
b role_name "" multiplicity "" protected
cpp default " ${comment}${static}${mutable}${volatile}${const}${type}* ${name}${value};
"
classrelation_ref 129802 // <aggregation>
end
classrelation 130058 // write_buffer (<association>)
relation_ref 129418 // <association>
end
end
class 128949 "FrameDescriptor"
@ -459,10 +475,65 @@ ${inlines}
classrelation_ref 128778 // <realization>
b multiplicity "" parent class_ref 128906 // SmartPointer
end
end
activity 128010 "get frame"
end
class 129034 "WriteBufferPool"
visibility package
cpp_decl "${comment}${template}class ${name}${inherit}
{
${members} };
${inlines}
"
java_decl ""
idl_decl ""
explicit_switch_type ""
classrelation 130186 // <association>
relation 129546 ----
a role_name "" multiplicity "" protected
cpp default " ${comment}${static}${mutable}${volatile}${const}${type}* ${name}${value};
"
classrelation_ref 130186 // <association>
b role_name "" multiplicity "" protected
cpp default " ${comment}${static}${mutable}${volatile}${const}${type}* ${name}${value};
"
classrelation_ref 130314 // <association>
end
end
class 129162 "WriteBuffer"
visibility package
cpp_decl "${comment}${template}class ${name}${inherit}
{
${members} };
${inlines}
"
java_decl ""
idl_decl ""
explicit_switch_type ""
classrelation 129802 // <aggregation>
relation_ref 129290 // <aggregation>
end
classrelation 129930 // frame (<association>)
relation 129418 ----
a role_name "frame" multiplicity "0..1" protected
cpp default " ${comment}${static}${mutable}${volatile}${const}${type}* ${name}${value};
"
classrelation_ref 129930 // frame (<association>)
b role_name "write_buffer" multiplicity "0..1" protected
cpp default " ${comment}${static}${mutable}${volatile}${const}${type}* ${name}${value};
"
classrelation_ref 130058 // write_buffer (<association>)
end
classrelation 130314 // <association>
relation_ref 129546 // <association>
end
end
end
end

86
uml/cinelerra3/128181.diagram
View file

@ -1,4 +1,4 @@
format 38
format 40
classcanvas 128010 class_ref 128778 // FileReference
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
@ -10,11 +10,11 @@ classcanvas 128053 class_ref 128181 // File
end
classcanvas 128181 class_ref 128309 // FileHandleCache
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 482 146 2000
xyz 666 51 2000
end
classcanvas 128309 class_ref 128437 // FileMapCache
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 662 397 2000
xyz 694 253 2000
end
classcanvas 128394 class_ref 128906 // SmartPointer
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
@ -22,15 +22,15 @@ classcanvas 128394 class_ref 128906 // SmartPointer
end
classcanvas 128565 class_ref 128565 // FileMap
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 510 401 2000
xyz 597 253 2000
end
classcanvas 128693 class_ref 128693 // FileHandle
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 508 287 2000
xyz 473 59 2000
end
classcanvas 128821 class_ref 128821 // Frame
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 516 549 2000
xyz 505 660 2000
end
classcanvas 128949 class_ref 128949 // FrameDescriptor
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
@ -44,7 +44,7 @@ fragment 129589 "public interfaces"
xyzwh 232 6 1995 198 803
end
fragment 129717 "implementation details"
xyzwh 437 5 1995 391 805
xyzwh 437 8 1975 387 798
end
fragment 131338 "References hold by others"
xyzwh 1 7 1990 225 802
@ -53,28 +53,42 @@ classcanvas 131553 class_ref 128225 // FrameReference
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 48 549 2000
end
note 133002 "mmaped files are used for reading"
color transparent xyzwh 509 159 1990 304 221
note 133130 "temporary cache and normal io for writing"
color transparent xyzwh 507 399 1980 303 210
classcanvas 133514 class_ref 129034 // WriteBufferPool
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 657 446 2000
end
classcanvas 133642 class_ref 129162 // WriteBuffer
draw_all_relations default hide_attributes default hide_operations default show_members_full_definition default show_members_visibility default show_members_stereotype default show_parameter_dir default show_parameter_name default package_name_in_tab default class_drawing_mode default drawing_language default show_context_mode default auto_label_position default show_infonote default shadow default
xyz 543 520 2005
end
relationcanvas 128138 relation_ref 128138 // <unidirectional association>
from ref 128010 z 1999 to ref 128053
role_a_pos 251 279 3000 no_role_b
multiplicity_a_pos 246 321 3000 no_multiplicity_b
relationcanvas 128266 relation_ref 128266 // <aggregation>
from ref 128565 z 1999 to ref 128821
role_a_pos 545 525 3000 role_b_pos 545 455 3000
multiplicity_a_pos 532 524 3000 multiplicity_b_pos 529 455 3000
from ref 128565 z 1999 to point 450 388
line 133258 z 1999 to point 450 594
line 133386 z 1999 to ref 128821
role_a_pos 437 620 3000 role_b_pos 499 316 3000
multiplicity_a_pos 486 632 3000 multiplicity_b_pos 578 301 3000
relationcanvas 128353 relation_ref 128225 // <directional aggregation>
from ref 128053 z 1999 to ref 128693
role_a_pos 442 279 3000 no_role_b
multiplicity_a_pos 463 321 3000 no_multiplicity_b
role_a_pos 497 115 3000 no_role_b
multiplicity_a_pos 448 115 3000 no_multiplicity_b
relationcanvas 128481 relation_ref 128353 // <directional aggregation>
geometry HVr
from ref 128821 z 1999 to point 541 741
from ref 128821 z 1999 to point 529 741
line 131978 z 1999 to ref 128949
role_a_pos 396 714 3000 no_role_b
role_a_pos 406 713 3000 no_role_b
no_multiplicity_a no_multiplicity_b
relationcanvas 128609 relation_ref 128481 // <directional aggregation>
from ref 128053 z 1999 to ref 128565
role_a_pos 424 382 3000 no_role_b
multiplicity_a_pos 488 424 3000 no_multiplicity_b
role_a_pos 521 232 3000 no_role_b
multiplicity_a_pos 584 274 3000 no_multiplicity_b
relationcanvas 128650 relation_ref 128522 // <realization>
from ref 128010 z 1999 to ref 128394
no_role_a no_role_b
@ -84,27 +98,37 @@ relationcanvas 129034 relation_ref 128650 // <realization>
no_role_a no_role_b
no_multiplicity_a no_multiplicity_b
relationcanvas 129121 relation_ref 128609 // <directional aggregation by value>
from ref 128181 z 1999 stereotype "<<list>>" xyz 523 229 3000 to ref 128693
role_a_pos 552 259 3000 no_role_b
multiplicity_a_pos 539 259 3000 no_multiplicity_b
from ref 128181 z 1999 stereotype "<<list>>" xyz 584 63 3000 to ref 128693
role_a_pos 568 51 3000 no_role_b
multiplicity_a_pos 568 93 3000 no_multiplicity_b
relationcanvas 129290 relation_ref 128778 // <aggregation>
from ref 129461 z 1999 to ref 128053
role_a_pos 347 246 3000 no_role_b
multiplicity_a_pos 311 246 3000 no_multiplicity_b
relationcanvas 129930 relation_ref 128906 // <directional aggregation by value>
from ref 128309 z 1999 stereotype "<<list>>" xyz 719 372 3000 to point 714 361
line 130314 z 1999 to point 643 361
from ref 128309 z 1999 stereotype "<<list>>" xyz 690 225 3000 to point 750 218
line 132746 z 1999 to point 627 217
line 130058 z 1999 to ref 128565
role_a_pos 638 337 3000 no_role_b
multiplicity_a_pos 575 381 3000 no_multiplicity_b
role_a_pos 648 192 3000 no_role_b
multiplicity_a_pos 614 225 3000 no_multiplicity_b
relationcanvas 131425 relation_ref 129121 // <directional aggregation by value>
from ref 128309 z 1999 to point 714 473
line 130186 z 1999 stereotype "<<list>>" xyz 720 455 3000 to point 644 473
line 130570 z 1999 to ref 128565
role_a_pos 649 483 3000 no_role_b
multiplicity_a_pos 573 440 3000 no_multiplicity_b
from ref 128309 z 1999 stereotype "<<list>>" xyz 688 298 3000 to point 748 336
line 130570 z 1999 to point 629 337
line 132874 z 1999 to ref 128565
role_a_pos 690 336 3000 no_role_b
multiplicity_a_pos 611 310 3000 no_multiplicity_b
relationcanvas 131681 relation_ref 129249 // <unidirectional association>
from ref 131553 z 1999 to ref 128821
role_a_pos 459 542 3000 no_role_b
multiplicity_a_pos 473 584 3000 no_multiplicity_b
from ref 131553 z 1999 to point 331 570
line 132106 z 1999 to point 331 683
line 132234 z 1999 to ref 128821
role_a_pos 455 653 3000 no_role_b
multiplicity_a_pos 469 695 3000 no_multiplicity_b
relationcanvas 134794 relation_ref 129418 // <association>
from ref 133642 z 1999 to ref 128821
role_a_pos 553 632 3000 role_b_pos 584 575 3000
multiplicity_a_pos 507 632 3000 multiplicity_b_pos 538 575 3000
relationcanvas 135306 relation_ref 129546 // <association>
from ref 133514 z 1999 to ref 133642
no_role_a no_role_b
no_multiplicity_a no_multiplicity_b
end