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Revision 1.8 by root, Wed Nov 16 06:22:20 2011 UTC vs.
Revision 1.64 by root, Mon Apr 30 23:12:43 2012 UTC

…		…
8		8
9	=head1 DESCRIPTION	9	=head1 DESCRIPTION
10		10
11	This is an early release which might be useful, but hasn't seen much testing.	11	This is an early release which might be useful, but hasn't seen much testing.
12		12
		13	=head2 OpenCL FROM 10000 FEET HEIGHT
		14
		15	Here is a high level overview of OpenCL:
		16
		17	First you need to find one or more OpenCL::Platforms (kind of like
		18	vendors) - usually there is only one.
		19
		20	Each platform gives you access to a number of OpenCL::Device objects, e.g.
		21	your graphics card.
		22
		23	From a platform and some device(s), you create an OpenCL::Context, which is
		24	a very central object in OpenCL: Once you have a context you can create
		25	most other objects:
		26
		27	OpenCL::Program objects, which store source code and, after building for a
		28	specific device ("compiling and linking"), also binary programs. For each
		29	kernel function in a program you can then create an OpenCL::Kernel object
		30	which represents basically a function call with argument values.
		31
		32	OpenCL::Memory objects of various flavours: OpenCL::Buffer objects (flat
		33	memory areas, think arrays or structs) and OpenCL::Image objects (think 2d
		34	or 3d array) for bulk data and input and output for kernels.
		35
		36	OpenCL::Sampler objects, which are kind of like texture filter modes in
		37	OpenGL.
		38
		39	OpenCL::Queue objects - command queues, which allow you to submit memory
		40	reads, writes and copies, as well as kernel calls to your devices. They
		41	also offer a variety of methods to synchronise request execution, for
		42	example with barriers or OpenCL::Event objects.
		43
		44	OpenCL::Event objects are used to signal when something is complete.
		45
13	=head1 HELPFUL RESOURCES	46	=head2 HELPFUL RESOURCES
14		47
15	The OpenCL spec used to develop this module (1.2 spec was available, but	48	The OpenCL specs used to develop this module:
16	no implementation was available to me :).
17		49
18	http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf	50	http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf
		51	http://www.khronos.org/registry/cl/specs/opencl-1.2.pdf
		52	http://www.khronos.org/registry/cl/specs/opencl-1.2-extensions.pdf
19		53
20	OpenCL manpages:	54	OpenCL manpages:
21		55
22	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/	56	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/
		57	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/
		58
		59	If you are into UML class diagrams, the following diagram might help - if
		60	not, it will be mildly confusing (also, the class hierarchy of this module
		61	is much more fine-grained):
		62
		63	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/classDiagram.html
		64
		65	Here's a tutorial from AMD (very AMD-centric, too), not sure how useful it
		66	is, but at least it's free of charge:
		67
		68	http://developer.amd.com/zones/OpenCLZone/courses/Documents/Introduction_to_OpenCL_Programming%20Training_Guide%20%28201005%29.pdf
		69
		70	And here's NVIDIA's OpenCL Best Practises Guide:
		71
		72	http://developer.download.nvidia.com/compute/cuda/3_2/toolkit/docs/OpenCL_Best_Practices_Guide.pdf
		73
		74	=head1 BASIC WORKFLOW
		75
		76	To get something done, you basically have to do this once (refer to the
		77	examples below for actual code, this is just a high-level description):
		78
		79	Find some platform (e.g. the first one) and some device(s) (e.g. the first
		80	device of the platform), and create a context from those.
		81
		82	Create program objects from your OpenCL source code, then build (compile)
		83	the programs for each device you want to run them on.
		84
		85	Create kernel objects for all kernels you want to use (surprisingly, these
		86	are not device-specific).
		87
		88	Then, to execute stuff, you repeat these steps, possibly resuing or
		89	sharing some buffers:
		90
		91	Create some input and output buffers from your context. Set these as
		92	arguments to your kernel.
		93
		94	Enqueue buffer writes to initialise your input buffers (when not
		95	initialised at creation time).
		96
		97	Enqueue the kernel execution.
		98
		99	Enqueue buffer reads for your output buffer to read results.
23		100
24	=head1 EXAMPLES	101	=head1 EXAMPLES
25		102
26	=head2 Enumerate all devices and get contexts for them.	103	=head2 Enumerate all devices and get contexts for them.
27		104
		105	Best run this once to get a feel for the platforms and devices in your
		106	system.
		107
28	for my $platform (OpenCL::platforms) {	108	for my $platform (OpenCL::platforms) {
29	warn $platform->info (OpenCL::PLATFORM_NAME);	109	printf "platform: %s\n", $platform->name;
30	warn $platform->info (OpenCL::PLATFORM_EXTENSIONS);	110	printf "extensions: %s\n", $platform->extensions;
31	for my $device ($platform->devices) {	111	for my $device ($platform->devices) {
32	warn $device->info (OpenCL::DEVICE_NAME);	112	printf "+ device: %s\n", $device->name;
33	my $ctx = $device->context_simple;	113	my $ctx = $platform->context (undef, [$device]);
34	# do stuff	114	# do stuff
35	}	115	}
36	}	116	}
37		117
38	=head2 Get a useful context and a command queue.	118	=head2 Get a useful context and a command queue.
39		119
40	my $dev = ((OpenCL::platforms)[0]->devices)[0];	120	This is a useful boilerplate for any OpenCL program that only wants to use
41	my $ctx = $dev->context_simple;	121	one device,
42	my $queue = $ctx->command_queue_simple ($dev);	122
		123	my ($platform) = OpenCL::platforms; # find first platform
		124	my ($dev) = $platform->devices; # find first device of platform
		125	my $ctx = $platform->context (undef, [$dev]); # create context out of those
		126	my $queue = $ctx->queue ($dev); # create a command queue for the device
43		127
44	=head2 Print all supported image formats of a context.	128	=head2 Print all supported image formats of a context.
45		129
		130	Best run this once for your context, to see whats available and how to
		131	gather information.
		132
46	for my $type (OpenCL::MEM_OBJECT_IMAGE2D, OpenCL::MEM_OBJECT_IMAGE3D) {	133	for my $type (OpenCL::MEM_OBJECT_IMAGE2D, OpenCL::MEM_OBJECT_IMAGE3D) {
47	say "supported image formats for ", OpenCL::enum2str $type;	134	print "supported image formats for ", OpenCL::enum2str $type, "\n";
48		135
49	for my $f ($ctx->supported_image_formats (0, $type)) {	136	for my $f ($ctx->supported_image_formats (0, $type)) {
50	printf " %-10s %-20s\n", OpenCL::enum2str $f->[0], OpenCL::enum2str $f->[1];	137	printf " %-10s %-20s\n", OpenCL::enum2str $f->[0], OpenCL::enum2str $f->[1];
51	}	138	}
52	}	139	}
…		…
54	=head2 Create a buffer with some predefined data, read it back synchronously,	141	=head2 Create a buffer with some predefined data, read it back synchronously,
55	then asynchronously.	142	then asynchronously.
56		143
57	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");	144	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");
58		145
59	$queue->enqueue_read_buffer ($buf, 1, 1, 3, my $data);	146	$queue->read_buffer ($buf, 1, 1, 3, my $data);
60	warn $data;	147	print "$data\n";
61		148
62	my $ev = $queue->enqueue_read_buffer ($buf, 0, 1, 3, my $data);	149	my $ev = $queue->read_buffer ($buf, 0, 1, 3, my $data);
63	$ev->wait;	150	$ev->wait;
64	warn $data;	151	print "$data\n"; # prints "elm"
65		152
66	=head2 Create and build a program, then create a kernel out of one of its	153	=head2 Create and build a program, then create a kernel out of one of its
67	functions.	154	functions.
68		155
69	my $src = '	156	my $src = '
70	__kernel void	157	kernel void
71	squareit (__global float *input, __global float *output)	158	squareit (global float *input, global float *output)
72	{	159	{
73	size_t id = get_global_id (0);	160	$id = get_global_id (0);
74	output [id] = input [id] * input [id];	161	output [id] = input [id] * input [id];
75	}	162	}
76	';	163	';
77		164
78	my $prog = $ctx->program_with_source ($src);	165	my $prog = $ctx->build_program ($src);
79
80	eval { $prog->build ($dev); 1 }
81	or die $prog->build_info ($dev, OpenCL::PROGRAM_BUILD_LOG);
82
83	my $kernel = $prog->kernel ("squareit");	166	my $kernel = $prog->kernel ("squareit");
84		167
85	=head2 Create some input and output float buffers, then call squareit on them.	168	=head2 Create some input and output float buffers, then call the
		169	'squareit' kernel on them.
86		170
87	my $input = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, pack "f*", 1, 2, 3, 4.5);	171	my $input = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, pack "f*", 1, 2, 3, 4.5);
88	my $output = $ctx->buffer (0, OpenCL::SIZEOF_FLOAT * 5);	172	my $output = $ctx->buffer (0, OpenCL::SIZEOF_FLOAT * 5);
89		173
90	# set buffer	174	# set buffer
91	$kernel->set_buffer (0, $input);	175	$kernel->set_buffer (0, $input);
92	$kernel->set_buffer (1, $output);	176	$kernel->set_buffer (1, $output);
93		177
94	# execute it for all 4 numbers	178	# execute it for all 4 numbers
95	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	179	$queue->nd_range_kernel ($kernel, undef, [4], undef);
96		180
97	# enqueue a synchronous read	181	# enqueue a synchronous read
98	$queue->enqueue_read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	182	$queue->read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
99		183
100	# print the results:	184	# print the results:
101	say join ", ", unpack "f*", $data;	185	printf "%s\n", join ", ", unpack "f*", $data;
102		186
103	=head2 The same enqueue operations as before, but assuming an out-of-order queue,	187	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
104	showing off barriers.	188	showing off barriers.
105		189
106	# execute it for all 4 numbers	190	# execute it for all 4 numbers
107	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	191	$queue->nd_range_kernel ($kernel, undef, [4], undef);
108		192
109	# enqueue a barrier to ensure in-order execution	193	# enqueue a barrier to ensure in-order execution
110	$queue->enqueue_barrier;	194	$queue->barrier;
111		195
112	# enqueue an async read	196	# enqueue an async read
113	$queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	197	$queue->read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
114		198
115	# wait for all requests to finish	199	# wait for all requests to finish
116	$queue->finish;	200	$queue->finish;
117		201
118	=head2 The same enqueue operations as before, but assuming an out-of-order queue,	202	=head2 The same enqueue operations as before, but assuming an out-of-order queue,
119	showing off event objects and wait lists.	203	showing off event objects and wait lists.
120		204
121	# execute it for all 4 numbers	205	# execute it for all 4 numbers
122	my $ev = $queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	206	my $ev = $queue->nd_range_kernel ($kernel, undef, [4], undef);
123		207
124	# enqueue an async read	208	# enqueue an async read
125	$ev = $queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev);	209	$ev = $queue->read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data, $ev);
126		210
127	# wait for the last event to complete	211	# wait for the last event to complete
128	$ev->wait;	212	$ev->wait;
129		213
		214	=head2 Use the OpenGL module to share a texture between OpenCL and OpenGL and draw some julia
		215	set tunnel effect.
		216
		217	This is quite a long example to get you going - you can download it from
		218	L<http://cvs.schmorp.de/OpenCL/examples/juliaflight>.
		219
		220	use OpenGL ":all";
		221	use OpenCL;
		222
		223	my $S = $ARGV[0] || 256; # window/texture size, smaller is faster
		224
		225	# open a window and create a gl texture
		226	OpenGL::glpOpenWindow width => $S, height => $S;
		227	my $texid = glGenTextures_p 1;
		228	glBindTexture GL_TEXTURE_2D, $texid;
		229	glTexImage2D_c GL_TEXTURE_2D, 0, GL_RGBA8, $S, $S, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0;
		230
		231	# find and use the first opencl device that let's us get a shared opengl context
		232	my $platform;
		233	my $dev;
		234	my $ctx;
		235
		236	for (OpenCL::platforms) {
		237	$platform = $_;
		238	for ($platform->devices) {
		239	$dev = $_;
		240	$ctx = $platform->context ([OpenCL::GLX_DISPLAY_KHR, undef, OpenCL::GL_CONTEXT_KHR, undef], [$dev])
		241	and last;
		242	}
		243	}
		244
		245	$ctx
		246	or die "cannot find suitable OpenCL device\n";
		247
		248	my $queue = $ctx->queue ($dev);
		249
		250	# now attach an opencl image2d object to the opengl texture
		251	my $tex = $ctx->gl_texture2d (OpenCL::MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, $texid);
		252
		253	# now the boring opencl code
		254	my $src = <<EOF;
		255	kernel void
		256	juliatunnel (write_only image2d_t img, float time)
		257	{
		258	int2 xy = (int2)(get_global_id (0), get_global_id (1));
		259	float2 p = convert_float2 (xy) / $S.f * 2.f - 1.f;
		260
		261	float2 m = (float2)(1.f, p.y) / fabs (p.x); // tunnel
		262	m.x = fabs (fmod (m.x + time * 0.05f, 4.f) - 2.f);
		263
		264	float2 z = m;
		265	float2 c = (float2)(sin (time * 0.01133f), cos (time * 0.02521f));
		266
		267	for (int i = 0; i < 25 && dot (z, z) < 4.f; ++i) // standard julia
		268	z = (float2)(z.x * z.x - z.y * z.y, 2.f * z.x * z.y) + c;
		269
		270	float3 colour = (float3)(z.x, z.y, atan2 (z.y, z.x));
		271	write_imagef (img, xy, (float4)(colour * p.x * p.x, 1.));
		272	}
		273	EOF
		274
		275	my $prog = $ctx->build_program ($src);
		276	my $kernel = $prog->kernel ("juliatunnel");
		277
		278	# program compiled, kernel ready, now draw and loop
		279
		280	for (my $time; ; ++$time) {
		281	# acquire objects from opengl
		282	$queue->acquire_gl_objects ([$tex]);
		283
		284	# configure and run our kernel
		285	$kernel->setf ("mf", $tex, $time*2); # mf = memory object, float
		286	$queue->nd_range_kernel ($kernel, undef, [$S, $S], undef);
		287
		288	# release objects to opengl again
		289	$queue->release_gl_objects ([$tex]);
		290
		291	# wait
		292	$queue->finish;
		293
		294	# now draw the texture, the defaults should be all right
		295	glTexParameterf GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST;
		296
		297	glEnable GL_TEXTURE_2D;
		298	glBegin GL_QUADS;
		299	glTexCoord2f 0, 1; glVertex3i -1, -1, -1;
		300	glTexCoord2f 0, 0; glVertex3i 1, -1, -1;
		301	glTexCoord2f 1, 0; glVertex3i 1, 1, -1;
		302	glTexCoord2f 1, 1; glVertex3i -1, 1, -1;
		303	glEnd;
		304
		305	glXSwapBuffers;
		306
		307	select undef, undef, undef, 1/60;
		308	}
		309
130	=head1 DOCUMENTATION	310	=head1 DOCUMENTATION
131		311
132	=head2 BASIC CONVENTIONS	312	=head2 BASIC CONVENTIONS
133		313
134	This is not a 1:1 C-style translation of OpenCL to Perl - instead I	314	This is not a one-to-one C-style translation of OpenCL to Perl - instead
135	attempted to make the interface as type-safe as possible and introducing	315	I attempted to make the interface as type-safe as possible by introducing
136	object syntax where it makes sense. There are a number of important	316	object syntax where it makes sense. There are a number of important
137	differences between the OpenCL C API and this module:	317	differences between the OpenCL C API and this module:
138		318
139	=over 4	319	=over 4
140		320
141	=item * Object lifetime managament is automatic - there is no need	321	=item * Object lifetime managament is automatic - there is no need
142	to free objects explicitly (C<clReleaseXXX>), the release function	322	to free objects explicitly (C<clReleaseXXX>), the release function
143	is called automatically once all Perl references to it go away.	323	is called automatically once all Perl references to it go away.
144		324
145	=item * OpenCL uses CamelCase for function names (C<clGetPlatformInfo>),	325	=item * OpenCL uses CamelCase for function names
		326	(e.g. C<clGetPlatformIDs>, C<clGetPlatformInfo>), while this module
146	while this module uses underscores as word separator and often leaves out	327	uses underscores as word separator and often leaves out prefixes
147	prefixes (C<< $platform->info >>).	328	(C<OpenCL::platforms>, C<< $platform->info >>).
148		329
149	=item * OpenCL often specifies fixed vector function arguments as short	330	=item * OpenCL often specifies fixed vector function arguments as short
150	arrays (C<size_t origin[3]>), while this module explicitly expects the	331	arrays (C<size_t origin[3]>), while this module explicitly expects the
151	components as separate arguments-	332	components as separate arguments (C<$orig_x, $orig_y, $orig_z>) in
		333	function calls.
152		334
153	=item * Where possible, the row_pitch value is calculated from the perl	335	=item * Structures are often specified by flattening out their components
154	scalar length and need not be specified.	336	as with short vectors, and returned as arrayrefs.
155		337
156	=item * When enqueuing commands, the wait list is specified by adding	338	=item * When enqueuing commands, the wait list is specified by adding
157	extra arguments to the function - everywhere a C<$wait_events...> argument	339	extra arguments to the function - anywhere a C<$wait_events...> argument
158	is documented this can be any number of event objects.	340	is documented this can be any number of event objects. As an extsnion
		341	implemented by this module, C<undef> values will be ignored in the event
		342	list.
159		343
160	=item * When enqueuing commands, if the enqueue method is called in void	344	=item * When enqueuing commands, if the enqueue method is called in void
161	context, no event is created. In all other contexts an event is returned	345	context, no event is created. In all other contexts an event is returned
162	by the method.	346	by the method.
163		347
…		…
183	ulong IV - Q	367	ulong IV - Q
184	float NV float f	368	float NV float f
185	half IV ushort S	369	half IV ushort S
186	double NV double d	370	double NV double d
187		371
		372	=head2 GLX SUPPORT
		373
		374	Due to the sad state that OpenGL support is in in Perl (mostly the OpenGL
		375	module, which has little to no documentation and has little to no support
		376	for glX), this module, as a special extension, treats context creation
		377	properties C<OpenCL::GLX_DISPLAY_KHR> and C<OpenCL::GL_CONTEXT_KHR>
		378	specially: If either or both of these are C<undef>, then the OpenCL
		379	module tries to dynamically resolve C<glXGetCurrentDisplay> and
		380	C<glXGetCurrentContext>, call these functions and use their return values
		381	instead.
		382
		383	For this to work, the OpenGL library must be loaded, a GLX context must
		384	have been created and be made current, and C<dlsym> must be available and
		385	capable of finding the function via C<RTLD_DEFAULT>.
		386
		387	=head2 EVENT SYSTEM
		388
		389	OpenCL can generate a number of (potentially) asynchronous events, for
		390	example, after compiling a program, to signal a context-related error or,
		391	perhaps most important, to signal completion of queued jobs (by setting
		392	callbacks on OpenCL::Event objects).
		393
		394	To facilitate this, this module maintains an event queue - each
		395	time an asynchronous event happens, it is queued, and perl will be
		396	interrupted. This is implemented via the L<Async::Interrupt> module. In
		397	addition, this module has L<AnyEvent> support, so it can seamlessly
		398	integrate itself into many event loops.
		399
		400	Since this module is a bit hard to understand, here are some case examples:
		401
		402	=head3 Don't use callbacks.
		403
		404	When your program never uses any callbacks, then there will never be any
		405	notifications you need to take care of, and therefore no need to worry
		406	about all this.
		407
		408	You can achieve a great deal by explicitly waiting for events, or using
		409	barriers and flush calls. In many programs, there is no need at all to
		410	tinker with asynchronous events.
		411
		412	=head3 Use AnyEvent
		413
		414	This module automatically registers a watcher that invokes all outstanding
		415	event callbacks when AnyEvent is initialised (and block asynchronous
		416	interruptions). Using this mode of operations is the safest and most
		417	recommended one.
		418
		419	To use this, simply use AnyEvent and this module normally, make sure you
		420	have an event loop running:
		421
		422	use Gtk2 -init;
		423	use AnyEvent;
		424
		425	# initialise AnyEvent, by creating a watcher, or:
		426	AnyEvent::detect;
		427
		428	my $e = $queue->marker;
		429	$e->cb (sub {
		430	warn "opencl is finished\n";
		431	})
		432
		433	main Gtk2;
		434
		435	Note that this module will not initialise AnyEvent for you. Before
		436	AnyEvent is initialised, the module will asynchronously interrupt perl
		437	instead. To avoid any surprises, it's best to explicitly initialise
		438	AnyEvent.
		439
		440	You can temporarily enable asynchronous interruptions (see next paragraph)
		441	by calling C<$OpenCL::INTERRUPT->unblock> and disable them again by
		442	calling C<$OpenCL::INTERRUPT->block>.
		443
		444	=head3 Let yourself be interrupted at any time
		445
		446	This mode is the default unless AnyEvent is loaded and initialised. In
		447	this mode, OpenCL asynchronously interrupts a running perl program. The
		448	emphasis is on both I<asynchronously> and I<running> here.
		449
		450	Asynchronously means that perl might execute your callbacks at any
		451	time. For example, in the following code (I<THAT YOU SHOULD NOT COPY>),
		452	the C<until> loop following the marker call will be interrupted by the
		453	callback:
		454
		455	my $e = $queue->marker;
		456	my $flag;
		457	$e->cb (sub { $flag = 1 });
		458	1 until $flag;
		459	# $flag is now 1
		460
		461	The reason why you shouldn't blindly copy the above code is that
		462	busy waiting is a really really bad thing, and really really bad for
		463	performance.
		464
		465	While at first this asynchronous business might look exciting, it can be
		466	really hard, because you need to be prepared for the callback code to be
		467	executed at any time, which limits the amount of things the callback code
		468	can do safely.
		469
		470	This can be mitigated somewhat by using C<<
		471	$OpenCL::INTERRUPT->scope_block >> (see the L<Async::Interrupt>
		472	documentation for details).
		473
		474	The other problem is that your program must be actively I<running> to be
		475	interrupted. When you calculate stuff, your program is running. When you
		476	hang in some C functions or other block execution (by calling C<sleep>,
		477	C<select>, running an event loop and so on), your program is waiting, not
		478	running.
		479
		480	One way around that would be to attach a read watcher to your event loop,
		481	listening for events on C<< $OpenCL::INTERRUPT->pipe_fileno >>, using a
		482	dummy callback (C<sub { }>) to temporarily execute some perl code.
		483
		484	That is then awfully close to using the built-in AnyEvent support above,
		485	though, so consider that one instead.
		486
		487	=head3 Be creative
		488
		489	OpenCL exports the L<Async::Interrupt> object it uses in the global
		490	variable C<$OpenCL::INTERRUPT>. You can configure it in any way you like.
		491
		492	So if you want to feel like a real pro, err, wait, if you feel no risk
		493	menas no fun, you can experiment by implementing your own mode of
		494	operations.
		495
		496	=cut
		497
		498	package OpenCL;
		499
		500	use common::sense;
		501	use Carp ();
		502	use Async::Interrupt ();
		503
		504	our $POLL_FUNC; # set by XS
		505
		506	BEGIN {
		507	our $VERSION = '0.98';
		508
		509	require XSLoader;
		510	XSLoader::load (__PACKAGE__, $VERSION);
		511
		512	@OpenCL::Platform::ISA =
		513	@OpenCL::Device::ISA =
		514	@OpenCL::Context::ISA =
		515	@OpenCL::Queue::ISA =
		516	@OpenCL::Memory::ISA =
		517	@OpenCL::Sampler::ISA =
		518	@OpenCL::Program::ISA =
		519	@OpenCL::Kernel::ISA =
		520	@OpenCL::Event::ISA = OpenCL::Object::;
		521
		522	@OpenCL::Buffer::ISA =
		523	@OpenCL::Image::ISA = OpenCL::Memory::;
		524
		525	@OpenCL::BufferObj::ISA = OpenCL::Buffer::;
		526
		527	@OpenCL::Image2D::ISA =
		528	@OpenCL::Image3D::ISA =
		529	@OpenCL::Image2DArray::ISA =
		530	@OpenCL::Image1D::ISA =
		531	@OpenCL::Image1DArray::ISA =
		532	@OpenCL::Image1DBuffer::ISA = OpenCL::Image::;
		533
		534	@OpenCL::UserEvent::ISA = OpenCL::Event::;
		535	}
		536
188	=head2 THE OpenCL PACKAGE	537	=head2 THE OpenCL PACKAGE
189		538
190	=over 4	539	=over 4
191		540
192	=item $int = OpenCL::errno	541	=item $int = OpenCL::errno
193		542
194	The last error returned by a function - it's only changed on errors.	543	The last error returned by a function - it's only valid after an error occured
		544	and before calling another OpenCL function.
195		545
196	=item $str = OpenCL::err2str $errval	546	=item $str = OpenCL::err2str [$errval]
197		547
198	Comverts an error value into a human readable string.	548	Converts an error value into a human readable string. IF no error value is
		549	given, then the last error will be used (as returned by OpenCL::errno).
199		550
200	=item $str = OpenCL::err2str $enum	551	=item $str = OpenCL::enum2str $enum
201		552
202	Converts most enum values (inof parameter names, image format constants,	553	Converts most enum values (of parameter names, image format constants,
203	object types, addressing and filter modes, command types etc.) into a	554	object types, addressing and filter modes, command types etc.) into a
204	human readbale string. When confronted with some random integer it can be	555	human readable string. When confronted with some random integer it can be
205	very helpful to pass it through this function to maybe get some readable	556	very helpful to pass it through this function to maybe get some readable
206	string out of it.	557	string out of it.
207		558
208	=item @platforms = OpenCL::platforms	559	=item @platforms = OpenCL::platforms
209		560
210	Returns all available OpenCL::Platform objects.	561	Returns all available OpenCL::Platform objects.
211		562
212	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>	563	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformIDs.html>
213		564
214	=item $ctx = OpenCL::context_from_type_simple $type = OpenCL::DEVICE_TYPE_DEFAULT	565	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr
215		566
216	Tries to create a context from a default device and platform - never worked for me.	567	Tries to create a context from a default device and platform type - never worked for me.
217		568
218	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	569	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
219		570
		571	=item $ctx = OpenCL::context $properties, \@devices, $callback->($err, $pvt) = $print_stderr)
		572
		573	Create a new OpenCL::Context object using the given device object(s). This
		574	function isn't implemented yet, use C<< $platform->context >> instead.
		575
		576	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
		577
220	=item OpenCL::wait_for_events $wait_events...	578	=item OpenCL::wait_for_events $wait_events...
221		579
222	Waits for all events to complete.	580	Waits for all events to complete.
223		581
224	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	582	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
225		583
		584	=item OpenCL::poll
		585
		586	Checks if there are any outstanding events (see L<EVENT SYSTEM>) and
		587	invokes their callbacks.
		588
		589	=item $OpenCL::INTERRUPT
		590
		591	The L<Async::Interrupt> object used to signal asynchronous events (see
		592	L<EVENT SYSTEM>).
		593
		594	=cut
		595
		596	our $INTERRUPT = new Async::Interrupt c_cb => [$POLL_FUNC, 0];
		597
		598	&_eq_initialise ($INTERRUPT->signal_func);
		599
		600	=item $OpenCL::WATCHER
		601
		602	The L<AnyEvent> watcher object used to watch for asynchronous events (see
		603	L<EVENT SYSTEM>). This variable is C<undef> until L<AnyEvent> has been
		604	loaded I<and> initialised (e.g. by calling C<AnyEvent::detect>).
		605
		606	=cut
		607
		608	our $WATCHER;
		609
		610	sub _init_anyevent {
		611	$INTERRUPT->block;
		612	$WATCHER = AE::io ($INTERRUPT->pipe_fileno, 0, sub { $INTERRUPT->handle });
		613	}
		614
		615	if (defined $AnyEvent::MODEL) {
		616	_init_anyevent;
		617	} else {
		618	push @AnyEvent::post_detect, \&_init_anyevent;
		619	}
		620
226	=back	621	=back
227		622
		623	=head2 THE OpenCL::Object CLASS
		624
		625	This is the base class for all objects in the OpenCL module. The only
		626	method it implements is the C<id> method, which is only useful if you want
		627	to interface to OpenCL on the C level.
		628
		629	=over 4
		630
		631	=item $iv = $obj->id
		632
		633	OpenCL objects are represented by pointers or integers on the C level. If
		634	you want to interface to an OpenCL object directly on the C level, then
		635	you need this value, which is returned by this method. You should use an
		636	C<IV> type in your code and cast that to the correct type.
		637
		638	=cut
		639
		640	sub OpenCL::Object::id {
		641	ref $_[0] eq "SCALAR"
		642	? ${ $_[0] }
		643	: $_[0][0]
		644	}
		645
		646	=back
		647
228	=head2 THE OpenCL::Platform CLASS	648	=head2 THE OpenCL::Platform CLASS
229		649
230	=over 4	650	=over 4
231		651
		652	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)
		653
		654	Returns a list of matching OpenCL::Device objects.
		655
		656	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr)
		657
		658	Tries to create a context. Never worked for me, and you need devices explicitly anyway.
		659
		660	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>
		661
		662	=item $ctx = $platform->context ($properties, \@devices, $callback->($err, $pvt) = $print_stderr)
		663
		664	Create a new OpenCL::Context object using the given device object(s)- a
		665	CL_CONTEXT_PLATFORM property is supplied automatically.
		666
		667	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>
		668
232	=item $packed_value = $platform->info ($name)	669	=item $packed_value = $platform->info ($name)
233		670
234	Calls C<clGetPlatformInfo> and returns the packed, raw value - for	671	Calls C<clGetPlatformInfo> and returns the packed, raw value - for
235	strings, this will be the string, for other values you probably need to	672	strings, this will be the string (possibly including terminating \0), for
236	use the correct C<unpack>. This might get improved in the future. Hopefully.	673	other values you probably need to use the correct C<unpack>.
		674
		675	It's best to avoid this method and use one of the following convenience
		676	wrappers.
237		677
238	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>	678	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html>
239		679
240	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)	680	=item $platform->unload_compiler
241		681
242	Returns a list of matching OpenCL::Device objects.	682	Attempts to unload the compiler for this platform, for endless
		683	profit. Does nothing on OpenCL 1.1.
243		684
244	=item $ctx = $platform->context_from_type_simple ($type = OpenCL::DEVICE_TYPE_DEFAULT)
245
246	Tries to create a context. Never worked for me.
247
248	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContextFromType.html>	685	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clUnloadPlatformCompiler.html>
		686
		687	=for gengetinfo begin platform
		688
		689	=item $string = $platform->profile
		690
		691	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_PROFILE> and returns the result.
		692
		693	=item $string = $platform->version
		694
		695	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VERSION> and returns the result.
		696
		697	=item $string = $platform->name
		698
		699	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_NAME> and returns the result.
		700
		701	=item $string = $platform->vendor
		702
		703	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_VENDOR> and returns the result.
		704
		705	=item $string = $platform->extensions
		706
		707	Calls C<clGetPlatformInfo> with C<CL_PLATFORM_EXTENSIONS> and returns the result.
		708
		709	=for gengetinfo end platform
249		710
250	=back	711	=back
251		712
252	=head2 THE OpenCL::Device CLASS	713	=head2 THE OpenCL::Device CLASS
253		714
…		…
257		718
258	See C<< $platform->info >> for details.	719	See C<< $platform->info >> for details.
259		720
260	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>	721	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceInfo.html>
261		722
		723	=for gengetinfo begin device
		724
		725	=item $device_type = $device->type
		726
		727	Calls C<clGetDeviceInfo> with C<CL_DEVICE_TYPE> and returns the result.
		728
		729	=item $uint = $device->vendor_id
		730
		731	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR_ID> and returns the result.
		732
		733	=item $uint = $device->max_compute_units
		734
		735	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_COMPUTE_UNITS> and returns the result.
		736
		737	=item $uint = $device->max_work_item_dimensions
		738
		739	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS> and returns the result.
		740
		741	=item $int = $device->max_work_group_size
		742
		743	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_GROUP_SIZE> and returns the result.
		744
		745	=item @ints = $device->max_work_item_sizes
		746
		747	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WORK_ITEM_SIZES> and returns the result.
		748
		749	=item $uint = $device->preferred_vector_width_char
		750
		751	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_CHAR> and returns the result.
		752
		753	=item $uint = $device->preferred_vector_width_short
		754
		755	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_SHORT> and returns the result.
		756
		757	=item $uint = $device->preferred_vector_width_int
		758
		759	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_INT> and returns the result.
		760
		761	=item $uint = $device->preferred_vector_width_long
		762
		763	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_LONG> and returns the result.
		764
		765	=item $uint = $device->preferred_vector_width_float
		766
		767	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_FLOAT> and returns the result.
		768
		769	=item $uint = $device->preferred_vector_width_double
		770
		771	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_DOUBLE> and returns the result.
		772
		773	=item $uint = $device->max_clock_frequency
		774
		775	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CLOCK_FREQUENCY> and returns the result.
		776
		777	=item $bitfield = $device->address_bits
		778
		779	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ADDRESS_BITS> and returns the result.
		780
		781	=item $uint = $device->max_read_image_args
		782
		783	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_READ_IMAGE_ARGS> and returns the result.
		784
		785	=item $uint = $device->max_write_image_args
		786
		787	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_WRITE_IMAGE_ARGS> and returns the result.
		788
		789	=item $ulong = $device->max_mem_alloc_size
		790
		791	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_MEM_ALLOC_SIZE> and returns the result.
		792
		793	=item $int = $device->image2d_max_width
		794
		795	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_WIDTH> and returns the result.
		796
		797	=item $int = $device->image2d_max_height
		798
		799	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE2D_MAX_HEIGHT> and returns the result.
		800
		801	=item $int = $device->image3d_max_width
		802
		803	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_WIDTH> and returns the result.
		804
		805	=item $int = $device->image3d_max_height
		806
		807	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_HEIGHT> and returns the result.
		808
		809	=item $int = $device->image3d_max_depth
		810
		811	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE3D_MAX_DEPTH> and returns the result.
		812
		813	=item $uint = $device->image_support
		814
		815	Calls C<clGetDeviceInfo> with C<CL_DEVICE_IMAGE_SUPPORT> and returns the result.
		816
		817	=item $int = $device->max_parameter_size
		818
		819	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_PARAMETER_SIZE> and returns the result.
		820
262	=item $ctx = $device->context_simple	821	=item $uint = $device->max_samplers
263		822
264	Convenience function to create a new OpenCL::Context object.	823	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_SAMPLERS> and returns the result.
265		824
266	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>	825	=item $uint = $device->mem_base_addr_align
		826
		827	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MEM_BASE_ADDR_ALIGN> and returns the result.
		828
		829	=item $uint = $device->min_data_type_align_size
		830
		831	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MIN_DATA_TYPE_ALIGN_SIZE> and returns the result.
		832
		833	=item $device_fp_config = $device->single_fp_config
		834
		835	Calls C<clGetDeviceInfo> with C<CL_DEVICE_SINGLE_FP_CONFIG> and returns the result.
		836
		837	=item $device_mem_cache_type = $device->global_mem_cache_type
		838
		839	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_TYPE> and returns the result.
		840
		841	=item $uint = $device->global_mem_cacheline_size
		842
		843	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHELINE_SIZE> and returns the result.
		844
		845	=item $ulong = $device->global_mem_cache_size
		846
		847	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_CACHE_SIZE> and returns the result.
		848
		849	=item $ulong = $device->global_mem_size
		850
		851	Calls C<clGetDeviceInfo> with C<CL_DEVICE_GLOBAL_MEM_SIZE> and returns the result.
		852
		853	=item $ulong = $device->max_constant_buffer_size
		854
		855	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE> and returns the result.
		856
		857	=item $uint = $device->max_constant_args
		858
		859	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_CONSTANT_ARGS> and returns the result.
		860
		861	=item $device_local_mem_type = $device->local_mem_type
		862
		863	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_TYPE> and returns the result.
		864
		865	=item $ulong = $device->local_mem_size
		866
		867	Calls C<clGetDeviceInfo> with C<CL_DEVICE_LOCAL_MEM_SIZE> and returns the result.
		868
		869	=item $boolean = $device->error_correction_support
		870
		871	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ERROR_CORRECTION_SUPPORT> and returns the result.
		872
		873	=item $int = $device->profiling_timer_resolution
		874
		875	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILING_TIMER_RESOLUTION> and returns the result.
		876
		877	=item $boolean = $device->endian_little
		878
		879	Calls C<clGetDeviceInfo> with C<CL_DEVICE_ENDIAN_LITTLE> and returns the result.
		880
		881	=item $boolean = $device->available
		882
		883	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AVAILABLE> and returns the result.
		884
		885	=item $boolean = $device->compiler_available
		886
		887	Calls C<clGetDeviceInfo> with C<CL_DEVICE_COMPILER_AVAILABLE> and returns the result.
		888
		889	=item $device_exec_capabilities = $device->execution_capabilities
		890
		891	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXECUTION_CAPABILITIES> and returns the result.
		892
		893	=item $command_queue_properties = $device->properties
		894
		895	Calls C<clGetDeviceInfo> with C<CL_DEVICE_QUEUE_PROPERTIES> and returns the result.
		896
		897	=item $ = $device->platform
		898
		899	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PLATFORM> and returns the result.
		900
		901	=item $string = $device->name
		902
		903	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NAME> and returns the result.
		904
		905	=item $string = $device->vendor
		906
		907	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VENDOR> and returns the result.
		908
		909	=item $string = $device->driver_version
		910
		911	Calls C<clGetDeviceInfo> with C<CL_DRIVER_VERSION> and returns the result.
		912
		913	=item $string = $device->profile
		914
		915	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PROFILE> and returns the result.
		916
		917	=item $string = $device->version
		918
		919	Calls C<clGetDeviceInfo> with C<CL_DEVICE_VERSION> and returns the result.
		920
		921	=item $string = $device->extensions
		922
		923	Calls C<clGetDeviceInfo> with C<CL_DEVICE_EXTENSIONS> and returns the result.
		924
		925	=item $uint = $device->preferred_vector_width_half
		926
		927	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PREFERRED_VECTOR_WIDTH_HALF> and returns the result.
		928
		929	=item $uint = $device->native_vector_width_char
		930
		931	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_CHAR> and returns the result.
		932
		933	=item $uint = $device->native_vector_width_short
		934
		935	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_SHORT> and returns the result.
		936
		937	=item $uint = $device->native_vector_width_int
		938
		939	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_INT> and returns the result.
		940
		941	=item $uint = $device->native_vector_width_long
		942
		943	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_LONG> and returns the result.
		944
		945	=item $uint = $device->native_vector_width_float
		946
		947	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_FLOAT> and returns the result.
		948
		949	=item $uint = $device->native_vector_width_double
		950
		951	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_DOUBLE> and returns the result.
		952
		953	=item $uint = $device->native_vector_width_half
		954
		955	Calls C<clGetDeviceInfo> with C<CL_DEVICE_NATIVE_VECTOR_WIDTH_HALF> and returns the result.
		956
		957	=item $device_fp_config = $device->double_fp_config
		958
		959	Calls C<clGetDeviceInfo> with C<CL_DEVICE_DOUBLE_FP_CONFIG> and returns the result.
		960
		961	=item $device_fp_config = $device->half_fp_config
		962
		963	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HALF_FP_CONFIG> and returns the result.
		964
		965	=item $boolean = $device->host_unified_memory
		966
		967	Calls C<clGetDeviceInfo> with C<CL_DEVICE_HOST_UNIFIED_MEMORY> and returns the result.
		968
		969	=item $device = $device->parent_device_ext
		970
		971	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARENT_DEVICE_EXT> and returns the result.
		972
		973	=item @device_partition_property_exts = $device->partition_types_ext
		974
		975	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_TYPES_EXT> and returns the result.
		976
		977	=item @device_partition_property_exts = $device->affinity_domains_ext
		978
		979	Calls C<clGetDeviceInfo> with C<CL_DEVICE_AFFINITY_DOMAINS_EXT> and returns the result.
		980
		981	=item $uint = $device->reference_count_ext
		982
		983	Calls C<clGetDeviceInfo> with C<CL_DEVICE_REFERENCE_COUNT_EXT> and returns the result.
		984
		985	=item @device_partition_property_exts = $device->partition_style_ext
		986
		987	Calls C<clGetDeviceInfo> with C<CL_DEVICE_PARTITION_STYLE_EXT> and returns the result.
		988
		989	=for gengetinfo end device
267		990
268	=back	991	=back
269		992
270	=head2 THE OpenCL::Context CLASS	993	=head2 THE OpenCL::Context CLASS
271		994
272	=over 4	995	=over 4
273		996
274	=item $packed_value = $ctx->info ($name)	997	=item $prog = $ctx->build_program ($program, $options = "")
275		998
276	See C<< $platform->info >> for details.	999	This convenience function tries to build the program on all devices in
		1000	the context. If the build fails, then the function will C<croak> with the
		1001	build log. Otherwise ti returns the program object.
277		1002
278	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>	1003	The C<$program> can either be a C<OpenCL::Program> object or a string
		1004	containing the program. In the latter case, a program objetc will be
		1005	created automatically.
279		1006
280	=item $queue = $ctx->command_queue_simple ($device)	1007	=cut
281		1008
		1009	sub OpenCL::Context::build_program {
		1010	my ($self, $prog, $options) = @_;
		1011
		1012	$prog = $self->program_with_source ($prog)
		1013	unless ref $prog;
		1014
		1015	eval { $prog->build (undef, $options); 1 }
		1016	or errno == BUILD_PROGRAM_FAILURE
		1017	or errno == INVALID_BINARY # workaround nvidia bug
		1018	or Carp::croak "OpenCL::Context->build_program: " . err2str;
		1019
		1020	# we check status for all devices
		1021	for my $dev ($self->devices) {
		1022	$prog->build_status ($dev) == BUILD_SUCCESS
		1023	or Carp::croak "Building OpenCL program for device '" . $dev->name . "' failed:\n"
		1024	. $prog->build_log ($dev);
		1025	}
		1026
		1027	$prog
		1028	}
		1029
		1030	=item $queue = $ctx->queue ($device, $properties)
		1031
282	Convenience function to create a new OpenCL::Queue object from the context and the given device.	1032	Create a new OpenCL::Queue object from the context and the given device.
283		1033
284	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>	1034	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateCommandQueue.html>
285		1035
		1036	Example: create an out-of-order queue.
		1037
		1038	$queue = $ctx->queue ($device, OpenCL::QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE);
		1039
286	=item $ev = $ctx->user_event	1040	=item $ev = $ctx->user_event
287		1041
288	Creates a new OpenCL::UserEvent object.	1042	Creates a new OpenCL::UserEvent object.
289		1043
290	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>	1044	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateUserEvent.html>
291		1045
292	=item $buf = $ctx->buffer ($flags, $len)	1046	=item $buf = $ctx->buffer ($flags, $len)
293		1047
294	Creates a new OpenCL::Buffer object with the given flags and octet-size.	1048	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object with the
		1049	given flags and octet-size.
295		1050
296	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>	1051	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateBuffer.html>
297		1052
298	=item $buf = $ctx->buffer_sv ($flags, $data)	1053	=item $buf = $ctx->buffer_sv ($flags, $data)
299		1054
300	Creates a new OpenCL::Buffer object and initialise it with the given data values.	1055	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object and
		1056	initialise it with the given data values.
301		1057
		1058	=item $img = $ctx->image ($self, $flags, $channel_order, $channel_type, $type, $width, $height, $depth = 0, $array_size = 0, $row_pitch = 0, $slice_pitch = 0, $num_mip_level = 0, $num_samples = 0, $*data = &PL_sv_undef)
		1059
		1060	Creates a new OpenCL::Image object and optionally initialises it with
		1061	the given data values.
		1062
		1063	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateImage.html>
		1064
302	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $data)	1065	=item $img = $ctx->image2d ($flags, $channel_order, $channel_type, $width, $height, $row_pitch = 0, $data = undef)
303		1066
304	Creates a new OpenCL::Image2D object and optionally initialises it with the given data values.	1067	Creates a new OpenCL::Image2D object and optionally initialises it with
		1068	the given data values.
305		1069
306	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>	1070	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage2D.html>
307		1071
308	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $slice_pitch, $data)	1072	=item $img = $ctx->image3d ($flags, $channel_order, $channel_type, $width, $height, $depth, $row_pitch = 0, $slice_pitch = 0, $data = undef)
309		1073
310	Creates a new OpenCL::Image3D object and optionally initialises it with the given data values.	1074	Creates a new OpenCL::Image3D object and optionally initialises it with
		1075	the given data values.
311		1076
312	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>	1077	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateImage3D.html>
		1078
		1079	=item $buffer = $ctx->gl_buffer ($flags, $bufobj)
		1080
		1081	Creates a new OpenCL::Buffer (actually OpenCL::BufferObj) object that refers to the given
		1082	OpenGL buffer object.
		1083
		1084	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLBuffer.html
		1085
		1086	=item $img = $ctx->gl_texture ($flags, $target, $miplevel, $texture)
		1087
		1088	Creates a new OpenCL::Image object that refers to the given OpenGL
		1089	texture object or buffer.
		1090
		1091	http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCreateFromGLTexture.html
		1092
		1093	=item $img = $ctx->gl_texture2d ($flags, $target, $miplevel, $texture)
		1094
		1095	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1096	2D texture object.
		1097
		1098	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture2D.html
		1099
		1100	=item $img = $ctx->gl_texture3d ($flags, $target, $miplevel, $texture)
		1101
		1102	Creates a new OpenCL::Image3D object that refers to the given OpenGL
		1103	3D texture object.
		1104
		1105	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLTexture3D.html
		1106
		1107	=item $ctx->gl_renderbuffer ($flags, $renderbuffer)
		1108
		1109	Creates a new OpenCL::Image2D object that refers to the given OpenGL
		1110	render buffer.
		1111
		1112	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateFromGLRenderbuffer.html
313		1113
314	=item @formats = $ctx->supported_image_formats ($flags, $image_type)	1114	=item @formats = $ctx->supported_image_formats ($flags, $image_type)
315		1115
316	Returns a list of matching image formats - each format is an arrayref with	1116	Returns a list of matching image formats - each format is an arrayref with
317	two values, $channel_order and $channel_type, in it.	1117	two values, $channel_order and $channel_type, in it.
…		…
328		1128
329	Creates a new OpenCL::Program object from the given source code.	1129	Creates a new OpenCL::Program object from the given source code.
330		1130
331	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>	1131	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateProgramWithSource.html>
332		1132
		1133	=item $packed_value = $ctx->info ($name)
		1134
		1135	See C<< $platform->info >> for details.
		1136
		1137	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>
		1138
		1139	=for gengetinfo begin context
		1140
		1141	=item $uint = $context->reference_count
		1142
		1143	Calls C<clGetContextInfo> with C<CL_CONTEXT_REFERENCE_COUNT> and returns the result.
		1144
		1145	=item @devices = $context->devices
		1146
		1147	Calls C<clGetContextInfo> with C<CL_CONTEXT_DEVICES> and returns the result.
		1148
		1149	=item @property_ints = $context->properties
		1150
		1151	Calls C<clGetContextInfo> with C<CL_CONTEXT_PROPERTIES> and returns the result.
		1152
		1153	=item $uint = $context->num_devices
		1154
		1155	Calls C<clGetContextInfo> with C<CL_CONTEXT_NUM_DEVICES> and returns the result.
		1156
		1157	=for gengetinfo end context
		1158
333	=back	1159	=back
334		1160
335	=head2 THE OpenCL::Queue CLASS	1161	=head2 THE OpenCL::Queue CLASS
336		1162
337	An OpenCL::Queue represents an execution queue for OpenCL. You execute	1163	An OpenCL::Queue represents an execution queue for OpenCL. You execute
338	requests by calling their respective C<enqueue_xxx> method and waitinf for	1164	requests by calling their respective method and waiting for it to complete
339	it to complete in some way.	1165	in some way.
340		1166
341	All the enqueue methods return an event object that can be used to wait	1167	Most methods that enqueue some request return an event object that can
342	for completion, unless the method is called in void context, in which case	1168	be used to wait for completion (optionally using a callback), unless
343	no event object is created.	1169	the method is called in void context, in which case no event object is
		1170	created.
344		1171
345	They also allow you to specify any number of other event objects that this	1172	They also allow you to specify any number of other event objects that this
346	request has to wait for before it starts executing, by simply passing the	1173	request has to wait for before it starts executing, by simply passing the
347	event objects as extra parameters to the enqueue methods.	1174	event objects as extra parameters to the enqueue methods. To simplify
		1175	program design, this module ignores any C<undef> values in the list of
		1176	events. This makes it possible to code operations such as this, without
		1177	having to put a valid event object into C<$event> first:
		1178
		1179	$event = $queue->xxx (..., $event);
348		1180
349	Queues execute in-order by default, without any parallelism, so in most	1181	Queues execute in-order by default, without any parallelism, so in most
350	cases (i.e. you use only one queue) it's not necessary to wait for or	1182	cases (i.e. you use only one queue) it's not necessary to wait for or
351	create event objects.	1183	create event objects, althoguh an our of order queue is often a bit
		1184	faster.
352		1185
353	=over 4	1186	=over 4
354		1187
355	=item $packed_value = $ctx->info ($name)
356
357	See C<< $platform->info >> for details.
358
359	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetCommandQueueInfo.html>
360
361	=item $ev = $queue->enqueue_read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)	1188	=item $ev = $queue->read_buffer ($buffer, $blocking, $offset, $len, $data, $wait_events...)
362		1189
363	Reads data from buffer into the given string.	1190	Reads data from buffer into the given string.
364		1191
365	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>	1192	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBuffer.html>
366		1193
367	=item $ev = $queue->enqueue_write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)	1194	=item $ev = $queue->write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)
368		1195
369	Writes data to buffer from the given string.	1196	Writes data to buffer from the given string.
370		1197
371	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>	1198	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBuffer.html>
372		1199
373	=item $ev = $queue->enqueue_copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)	1200	=item $ev = $queue->copy_buffer ($src, $dst, $src_offset, $dst_offset, $len, $wait_events...)
374		1201
375	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>	1202	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBuffer.html>
376		1203
		1204	=item $ev = $queue->read_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)
		1205
		1206	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadBufferRect.html
		1207
		1208	=item $ev = $queue->write_buffer_rect (OpenCL::Memory buf, cl_bool blocking, $buf_x, $buf_y, $buf_z, $host_x, $host_y, $host_z, $width, $height, $depth, $buf_row_pitch, $buf_slice_pitch, $host_row_pitch, $host_slice_pitch, $data, $wait_events...)
		1209
		1210	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteBufferRect.html
		1211
377	=item $ev = $queue->enqueue_read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)	1212	=item $ev = $queue->read_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
		1213
		1214	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferRect.html>
		1215
		1216	=item $ev = $queue->copy_buffer_to_image ($src_buffer, $dst_image, $src_offset, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
378		1217
379	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>	1218	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReadImage.html>
380		1219
381	=item $ev = $queue->enqueue_write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $data, $wait_events...)	1220	=item $ev = $queue->write_image ($src, $blocking, $x, $y, $z, $width, $height, $depth, $row_pitch, $slice_pitch, $data, $wait_events...)
382		1221
383	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>	1222	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWriteImage.html>
384		1223
		1224	=item $ev = $queue->copy_image ($src_image, $dst_image, $src_x, $src_y, $src_z, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $wait_events...)
		1225
		1226	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>
		1227
		1228	=item $ev = $queue->copy_image_to_buffer ($src_image, $dst_image, $src_x, $src_y, $src_z, $width, $height, $depth, $dst_offset, $wait_events...)
		1229
		1230	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
		1231
385	=item $ev = $queue->enqueue_copy_buffer_rect ($src, $dst, $src_x, $src_y, $src_z, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $src_row_pitch, $src_slice_pitch, 4dst_row_pitch, $dst_slice_pitch, $ait_event...)	1232	=item $ev = $queue->copy_buffer_rect ($src, $dst, $src_x, $src_y, $src_z, $dst_x, $dst_y, $dst_z, $width, $height, $depth, $src_row_pitch, $src_slice_pitch, $dst_row_pitch, $dst_slice_pitch, $wait_event...)
386		1233
387	Yeah.	1234	Yeah.
388		1235
389	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferRect.html>
390
391	=item $ev = $queue->enqueue_copy_buffer_to_image (OpenCL::Buffer src, OpenCL::Image dst, size_t src_offset, size_t dst_x, size_t dst_y, size_t dst_z, size_t width, size_t height, size_t depth, ...)
392
393	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.	1236	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferToImage.html>.
394		1237
395	=item $ev = $queue->enqueue_copy_image (OpenCL::Image src, OpenCL::Buffer dst, size_t src_x, size_t src_y, size_t src_z, size_t dst_x, size_t dst_y, size_t dst_z, size_t width, size_t height, size_t depth, ...)	1238	=item $ev = $queue->fill_buffer ($mem, $pattern, $offset, $size, ...)
396		1239
		1240	Fills the given buffer object with repeated applications of C<$pattern>,
		1241	starting at C<$offset> for C<$size> octets.
		1242
		1243	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillBuffer.html>
		1244
		1245	=item $ev = $queue->fill_image ($img, $r, $g, $b, $a, $x, $y, $z, $width, $height, $depth, ...)
		1246
		1247	Fills the given image area with the given rgba colour components. The
		1248	components are normally floating point values between C<0> and C<1>,
		1249	except when the image channel data type is a signe dor unsigned
		1250	unnormalised format, in which case the range is determined by the format.
		1251
397	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImage.html>	1252	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueFillImage.html>
398		1253
399	=item $ev = $queue->enqueue_copy_image_to_buffer (OpenCL::Image src, OpenCL::Buffer dst, size_t src_x, size_t src_y, size_t src_z, size_t width, size_t height, size_t depth, size_t dst_offset, ...)
400
401	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
402
403	=item $ev = $queue->enqueue_task ($kernel, $wait_events...)	1254	=item $ev = $queue->task ($kernel, $wait_events...)
404		1255
405	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>	1256	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueTask.html>
406		1257
407	=item $ev = $queue->enqueue_nd_range_kernel ($kernel, @$global_work_offset, @$global_work_size, @$local_work_size, $wait_events...)	1258	=item $ev = $queue->nd_range_kernel ($kernel, \@global_work_offset, \@global_work_size, \@local_work_size, $wait_events...)
408		1259
409	Enqueues a kernel execution.	1260	Enqueues a kernel execution.
410		1261
411	@$global_work_size must be specified as a reference to an array of	1262	\@global_work_size must be specified as a reference to an array of
412	integers specifying the work sizes (element counts).	1263	integers specifying the work sizes (element counts).
413		1264
414	@$global_work_offset must be either C<undef> (in which case all offsets	1265	\@global_work_offset must be either C<undef> (in which case all offsets
415	are C<0>), or a reference to an array of work offsets, with the same number	1266	are C<0>), or a reference to an array of work offsets, with the same number
416	of elements as @$global_work_size.	1267	of elements as \@global_work_size.
417		1268
418	@$local_work_size must be either C<undef> (in which case the	1269	\@local_work_size must be either C<undef> (in which case the
419	implementation is supposed to choose good local work sizes), or a	1270	implementation is supposed to choose good local work sizes), or a
420	reference to an array of local work sizes, with the same number of	1271	reference to an array of local work sizes, with the same number of
421	elements as @$global_work_size.	1272	elements as \@global_work_size.
422		1273
423	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>	1274	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueNDRangeKernel.html>
424		1275
425	=item $ev = $queue->enqueue_marker	1276	=item $ev = $queue->acquire_gl_objects ([object, ...], $wait_events...)
426		1277
		1278	Enqueues a list (an array-ref of OpenCL::Memory objects) to be acquired
		1279	for subsequent OpenCL usage.
		1280
427	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMarker.html>	1281	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueAcquireGLObjects.html>
428		1282
		1283	=item $ev = $queue->release_gl_objects ([object, ...], $wait_events...)
		1284
		1285	Enqueues a list (an array-ref of OpenCL::Memory objects) to be released
		1286	for subsequent OpenGL usage.
		1287
		1288	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueReleaseGLObjects.html>
		1289
429	=item $ev = $queue->enqueue_wait_for_events ($wait_events...)	1290	=item $ev = $queue->wait_for_events ($wait_events...)
430		1291
431	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>	1292	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueWaitForEvents.html>
432		1293
433	=item $queue->enqueue_barrier	1294	=item $ev = $queue->marker ($wait_events...)
434		1295
		1296	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueMarkerWithWaitList.html>
		1297
		1298	=item $ev = $queue->barrier ($wait_events...)
		1299
435	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueBarrier.html>	1300	L<http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clEnqueueBarrierWithWaitList.html>
436		1301
437	=item $queue->flush	1302	=item $queue->flush
438		1303
439	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>	1304	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFlush.html>
440		1305
441	=item $queue->finish	1306	=item $queue->finish
442		1307
443	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFinish.html>	1308	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clFinish.html>
444		1309
		1310	=item $packed_value = $queue->info ($name)
		1311
		1312	See C<< $platform->info >> for details.
		1313
		1314	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetCommandQueueInfo.html>
		1315
		1316	=for gengetinfo begin command_queue
		1317
		1318	=item $ctx = $command_queue->context
		1319
		1320	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_CONTEXT> and returns the result.
		1321
		1322	=item $device = $command_queue->device
		1323
		1324	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_DEVICE> and returns the result.
		1325
		1326	=item $uint = $command_queue->reference_count
		1327
		1328	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_REFERENCE_COUNT> and returns the result.
		1329
		1330	=item $command_queue_properties = $command_queue->properties
		1331
		1332	Calls C<clGetCommandQueueInfo> with C<CL_QUEUE_PROPERTIES> and returns the result.
		1333
		1334	=for gengetinfo end command_queue
		1335
445	=back	1336	=back
446		1337
447	=head2 THE OpenCL::Memory CLASS	1338	=head2 THE OpenCL::Memory CLASS
448		1339
449	This the superclass of all memory objects - OpenCL::Buffer, OpenCL::Image,	1340	This the superclass of all memory objects - OpenCL::Buffer, OpenCL::Image,
450	OpenCL::Image2D and OpenCL::Image3D. The subclasses of this class	1341	OpenCL::Image2D and OpenCL::Image3D.
451	currently only exist to allow type-checking.
452		1342
453	=over 4	1343	=over 4
454		1344
455	=item $packed_value = $memory->info ($name)	1345	=item $packed_value = $memory->info ($name)
456		1346
457	See C<< $platform->info >> for details.	1347	See C<< $platform->info >> for details.
458		1348
459	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetMemObjectInfo.html>	1349	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetMemObjectInfo.html>
460		1350
		1351	=for gengetinfo begin mem
		1352
		1353	=item $mem_object_type = $mem->type
		1354
		1355	Calls C<clGetMemObjectInfo> with C<CL_MEM_TYPE> and returns the result.
		1356
		1357	=item $mem_flags = $mem->flags
		1358
		1359	Calls C<clGetMemObjectInfo> with C<CL_MEM_FLAGS> and returns the result.
		1360
		1361	=item $int = $mem->size
		1362
		1363	Calls C<clGetMemObjectInfo> with C<CL_MEM_SIZE> and returns the result.
		1364
		1365	=item $ptr_value = $mem->host_ptr
		1366
		1367	Calls C<clGetMemObjectInfo> with C<CL_MEM_HOST_PTR> and returns the result.
		1368
		1369	=item $uint = $mem->map_count
		1370
		1371	Calls C<clGetMemObjectInfo> with C<CL_MEM_MAP_COUNT> and returns the result.
		1372
		1373	=item $uint = $mem->reference_count
		1374
		1375	Calls C<clGetMemObjectInfo> with C<CL_MEM_REFERENCE_COUNT> and returns the result.
		1376
		1377	=item $ctx = $mem->context
		1378
		1379	Calls C<clGetMemObjectInfo> with C<CL_MEM_CONTEXT> and returns the result.
		1380
		1381	=item $mem = $mem->associated_memobject
		1382
		1383	Calls C<clGetMemObjectInfo> with C<CL_MEM_ASSOCIATED_MEMOBJECT> and returns the result.
		1384
		1385	=item $int = $mem->offset
		1386
		1387	Calls C<clGetMemObjectInfo> with C<CL_MEM_OFFSET> and returns the result.
		1388
		1389	=for gengetinfo end mem
		1390
		1391	=item ($type, $name) = $mem->gl_object_info
		1392
		1393	Returns the OpenGL object type (e.g. OpenCL::GL_OBJECT_TEXTURE2D) and the
		1394	object "name" (e.g. the texture name) used to create this memory object.
		1395
		1396	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetGLObjectInfo.html>
		1397
461	=back	1398	=back
462		1399
		1400	=head2 THE OpenCL::Buffer CLASS
		1401
		1402	This is a subclass of OpenCL::Memory, and the superclass of
		1403	OpenCL::BufferObj. Its purpose is simply to distinguish between buffers
		1404	and sub-buffers.
		1405
		1406	=head2 THE OpenCL::BufferObj CLASS
		1407
		1408	This is a subclass of OpenCL::Buffer and thus OpenCL::Memory. It exists
		1409	because one cna create sub buffers of OpenLC::BufferObj objects, but not
		1410	sub buffers from these sub buffers.
		1411
		1412	=over 4
		1413
		1414	=item $subbuf = $buf_obj->sub_buffer_region ($flags, $origin, $size)
		1415
		1416	Creates an OpenCL::Buffer objects from this buffer and returns it. The
		1417	C<buffer_create_type> is assumed to be C<CL_BUFFER_CREATE_TYPE_REGION>.
		1418
		1419	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateSubBuffer.html>
		1420
		1421	=back
		1422
		1423	=head2 THE OpenCL::Image CLASS
		1424
		1425	This is the superclass of all image objects - OpenCL::Image1D,
		1426	OpenCL::Image1DArray, OpenCL::Image1DBuffer, OpenCL::Image2D,
		1427	OpenCL::Image2DArray and OpenCL::Image3D.
		1428
		1429	=over 4
		1430
		1431	=item $packed_value = $image->image_info ($name)
		1432
		1433	See C<< $platform->info >> for details.
		1434
		1435	The reason this method is not called C<info> is that there already is an
		1436	C<< ->info >> method inherited from C<OpenCL::Memory>.
		1437
		1438	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetImageInfo.html>
		1439
		1440	=item ($channel_order, $channel_data_type) = $image->format
		1441
		1442	Returns the channel order and type used to create the image by calling
		1443	C<clGetImageInfo> with C<CL_IMAGE_FORMAT>.
		1444
		1445	=for gengetinfo begin image
		1446
		1447	=item $int = $image->element_size
		1448
		1449	Calls C<clGetImageInfo> with C<CL_IMAGE_ELEMENT_SIZE> and returns the result.
		1450
		1451	=item $int = $image->row_pitch
		1452
		1453	Calls C<clGetImageInfo> with C<CL_IMAGE_ROW_PITCH> and returns the result.
		1454
		1455	=item $int = $image->slice_pitch
		1456
		1457	Calls C<clGetImageInfo> with C<CL_IMAGE_SLICE_PITCH> and returns the result.
		1458
		1459	=item $int = $image->width
		1460
		1461	Calls C<clGetImageInfo> with C<CL_IMAGE_WIDTH> and returns the result.
		1462
		1463	=item $int = $image->height
		1464
		1465	Calls C<clGetImageInfo> with C<CL_IMAGE_HEIGHT> and returns the result.
		1466
		1467	=item $int = $image->depth
		1468
		1469	Calls C<clGetImageInfo> with C<CL_IMAGE_DEPTH> and returns the result.
		1470
		1471	=for gengetinfo end image
		1472
		1473	=for gengetinfo begin gl_texture
		1474
		1475	=item $GLenum = $gl_texture->target
		1476
		1477	Calls C<clGetGLTextureInfo> with C<CL_GL_TEXTURE_TARGET> and returns the result.
		1478
		1479	=item $GLint = $gl_texture->gl_mipmap_level
		1480
		1481	Calls C<clGetGLTextureInfo> with C<CL_GL_MIPMAP_LEVEL> and returns the result.
		1482
		1483	=for gengetinfo end gl_texture
		1484
		1485	=back
		1486
463	=head2 THE OpenCL::Sampler CLASS	1487	=head2 THE OpenCL::Sampler CLASS
464		1488
465	=over 4	1489	=over 4
466		1490
467	=item $packed_value = $sampler->info ($name)	1491	=item $packed_value = $sampler->info ($name)
468		1492
469	See C<< $platform->info >> for details.	1493	See C<< $platform->info >> for details.
470		1494
471	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetSamplerInfo.html>	1495	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetSamplerInfo.html>
472		1496
		1497	=for gengetinfo begin sampler
		1498
		1499	=item $uint = $sampler->reference_count
		1500
		1501	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_REFERENCE_COUNT> and returns the result.
		1502
		1503	=item $ctx = $sampler->context
		1504
		1505	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_CONTEXT> and returns the result.
		1506
		1507	=item $addressing_mode = $sampler->normalized_coords
		1508
		1509	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_NORMALIZED_COORDS> and returns the result.
		1510
		1511	=item $filter_mode = $sampler->addressing_mode
		1512
		1513	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_ADDRESSING_MODE> and returns the result.
		1514
		1515	=item $boolean = $sampler->filter_mode
		1516
		1517	Calls C<clGetSamplerInfo> with C<CL_SAMPLER_FILTER_MODE> and returns the result.
		1518
		1519	=for gengetinfo end sampler
		1520
473	=back	1521	=back
474		1522
475	=head2 THE OpenCL::Program CLASS	1523	=head2 THE OpenCL::Program CLASS
476		1524
477	=over 4	1525	=over 4
478		1526
479	=item $packed_value = $program->info ($name)	1527	=item $program->build (\@devices = undef, $options = "", $cb->($program) = undef)
480		1528
481	See C<< $platform->info >> for details.
482
483	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
484
485	=item $program->build ($device, $options = "")
486
487	Tries to build the program with the givne options.	1529	Tries to build the program with the given options. See also the
		1530	C<$ctx->build> convenience function.
		1531
		1532	If a callback is specified, then it will be called when compilation is
		1533	finished. Note that many OpenCL implementations block your program while
		1534	compiling whether you use a callback or not. See C<build_async> if you
		1535	want to make sure the build is done in the background.
		1536
		1537	Note that some OpenCL implementations act up badly, and don't call the
		1538	callback in some error cases (but call it in others). This implementation
		1539	assumes the callback will always be called, and leaks memory if this is
		1540	not so. So best make sure you don't pass in invalid values.
		1541
		1542	Some implementations fail with C<OpenCL::INVALID_BINARY> when the
		1543	compilation state is successful but some later stage fails.
488		1544
489	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>	1545	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clBuildProgram.html>
		1546
		1547	=item $program->build_async (\@devices = undef, $options = "", $cb->($program) = undef)
		1548
		1549	Similar to C<< ->build >>, except it starts a thread, and never fails (you
		1550	need to check the compilation status form the callback, or by polling).
490		1551
491	=item $packed_value = $program->build_info ($device, $name)	1552	=item $packed_value = $program->build_info ($device, $name)
492		1553
493	Similar to C<< $platform->info >>, but returns build info for a previous	1554	Similar to C<< $platform->info >>, but returns build info for a previous
494	build attempt for the given device.	1555	build attempt for the given device.
…		…
500	Creates an OpenCL::Kernel object out of the named C<__kernel> function in	1561	Creates an OpenCL::Kernel object out of the named C<__kernel> function in
501	the program.	1562	the program.
502		1563
503	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>	1564	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernel.html>
504		1565
		1566	=item @kernels = $program->kernels_in_program
		1567
		1568	Returns all kernels successfully compiled for all devices in program.
		1569
		1570	http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateKernelsInProgram.html
		1571
		1572	=for gengetinfo begin program_build
		1573
		1574	=item $build_status = $program->build_status ($device)
		1575
		1576	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_STATUS> and returns the result.
		1577
		1578	=item $string = $program->build_options ($device)
		1579
		1580	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_OPTIONS> and returns the result.
		1581
		1582	=item $string = $program->build_log ($device)
		1583
		1584	Calls C<clGetProgramBuildInfo> with C<CL_PROGRAM_BUILD_LOG> and returns the result.
		1585
		1586	=for gengetinfo end program_build
		1587
		1588	=item $packed_value = $program->info ($name)
		1589
		1590	See C<< $platform->info >> for details.
		1591
		1592	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
		1593
		1594	=for gengetinfo begin program
		1595
		1596	=item $uint = $program->reference_count
		1597
		1598	Calls C<clGetProgramInfo> with C<CL_PROGRAM_REFERENCE_COUNT> and returns the result.
		1599
		1600	=item $ctx = $program->context
		1601
		1602	Calls C<clGetProgramInfo> with C<CL_PROGRAM_CONTEXT> and returns the result.
		1603
		1604	=item $uint = $program->num_devices
		1605
		1606	Calls C<clGetProgramInfo> with C<CL_PROGRAM_NUM_DEVICES> and returns the result.
		1607
		1608	=item @devices = $program->devices
		1609
		1610	Calls C<clGetProgramInfo> with C<CL_PROGRAM_DEVICES> and returns the result.
		1611
		1612	=item $string = $program->source
		1613
		1614	Calls C<clGetProgramInfo> with C<CL_PROGRAM_SOURCE> and returns the result.
		1615
		1616	=item @ints = $program->binary_sizes
		1617
		1618	Calls C<clGetProgramInfo> with C<CL_PROGRAM_BINARY_SIZES> and returns the result.
		1619
		1620	=for gengetinfo end program
		1621
		1622	=item @blobs = $program->binaries
		1623
		1624	Returns a string for the compiled binary for every device associated with
		1625	the program, empty strings indicate missing programs, and an empty result
		1626	means no program binaries are available.
		1627
		1628	These "binaries" are often, in fact, informative low-level assembly
		1629	sources.
		1630
		1631	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
		1632
505	=back	1633	=back
506		1634
507	=head2 THE OpenCL::Kernel CLASS	1635	=head2 THE OpenCL::Kernel CLASS
508		1636
509	=over 4	1637	=over 4
…		…
512		1640
513	See C<< $platform->info >> for details.	1641	See C<< $platform->info >> for details.
514		1642
515	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelInfo.html>	1643	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelInfo.html>
516		1644
		1645	=for gengetinfo begin kernel
		1646
		1647	=item $string = $kernel->function_name
		1648
		1649	Calls C<clGetKernelInfo> with C<CL_KERNEL_FUNCTION_NAME> and returns the result.
		1650
		1651	=item $uint = $kernel->num_args
		1652
		1653	Calls C<clGetKernelInfo> with C<CL_KERNEL_NUM_ARGS> and returns the result.
		1654
		1655	=item $uint = $kernel->reference_count
		1656
		1657	Calls C<clGetKernelInfo> with C<CL_KERNEL_REFERENCE_COUNT> and returns the result.
		1658
		1659	=item $ctx = $kernel->context
		1660
		1661	Calls C<clGetKernelInfo> with C<CL_KERNEL_CONTEXT> and returns the result.
		1662
		1663	=item $program = $kernel->program
		1664
		1665	Calls C<clGetKernelInfo> with C<CL_KERNEL_PROGRAM> and returns the result.
		1666
		1667	=for gengetinfo end kernel
		1668
		1669	=item $packed_value = $kernel->work_group_info ($device, $name)
		1670
		1671	See C<< $platform->info >> for details.
		1672
		1673	The reason this method is not called C<info> is that there already is an
		1674	C<< ->info >> method.
		1675
		1676	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetKernelWorkGroupInfo.html>
		1677
		1678	=for gengetinfo begin kernel_work_group
		1679
		1680	=item $int = $kernel->work_group_size ($device)
		1681
		1682	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_WORK_GROUP_SIZE> and returns the result.
		1683
		1684	=item @ints = $kernel->compile_work_group_size ($device)
		1685
		1686	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_COMPILE_WORK_GROUP_SIZE> and returns the result.
		1687
		1688	=item $ulong = $kernel->local_mem_size ($device)
		1689
		1690	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_LOCAL_MEM_SIZE> and returns the result.
		1691
		1692	=item $int = $kernel->preferred_work_group_size_multiple ($device)
		1693
		1694	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE> and returns the result.
		1695
		1696	=item $ulong = $kernel->private_mem_size ($device)
		1697
		1698	Calls C<clGetKernelWorkGroupInfo> with C<CL_KERNEL_PRIVATE_MEM_SIZE> and returns the result.
		1699
		1700	=for gengetinfo end kernel_work_group
		1701
		1702	=item $kernel->setf ($format, ...)
		1703
		1704	Sets the arguments of a kernel. Since OpenCL 1.1 doesn't have a generic
		1705	way to set arguments (and with OpenCL 1.2 it might be rather slow), you
		1706	need to specify a format argument, much as with C<printf>, to tell OpenCL
		1707	what type of argument it is.
		1708
		1709	The format arguments are single letters:
		1710
		1711	c char
		1712	C unsigned char
		1713	s short
		1714	S unsigned short
		1715	i int
		1716	I unsigned int
		1717	l long
		1718	L unsigned long
		1719
		1720	h half float (0..65535)
		1721	f float
		1722	d double
		1723
		1724	z local (octet size)
		1725
		1726	m memory object (buffer or image)
		1727	a sampler
		1728	e event
		1729
		1730	Space characters in the format string are ignored.
		1731
		1732	Example: set the arguments for a kernel that expects an int, two floats, a buffer and an image.
		1733
		1734	$kernel->setf ("i ff mm", 5, 0.5, 3, $buffer, $image);
		1735
517	=item $kernel->set_TYPE ($index, $value)	1736	=item $kernel->set_TYPE ($index, $value)
518		1737
		1738	=item $kernel->set_char ($index, $value)
		1739
		1740	=item $kernel->set_uchar ($index, $value)
		1741
		1742	=item $kernel->set_short ($index, $value)
		1743
		1744	=item $kernel->set_ushort ($index, $value)
		1745
		1746	=item $kernel->set_int ($index, $value)
		1747
		1748	=item $kernel->set_uint ($index, $value)
		1749
		1750	=item $kernel->set_long ($index, $value)
		1751
		1752	=item $kernel->set_ulong ($index, $value)
		1753
		1754	=item $kernel->set_half ($index, $value)
		1755
		1756	=item $kernel->set_float ($index, $value)
		1757
		1758	=item $kernel->set_double ($index, $value)
		1759
		1760	=item $kernel->set_memory ($index, $value)
		1761
		1762	=item $kernel->set_buffer ($index, $value)
		1763
		1764	=item $kernel->set_image ($index, $value)
		1765
		1766	=item $kernel->set_sampler ($index, $value)
		1767
		1768	=item $kernel->set_local ($index, $value)
		1769
		1770	=item $kernel->set_event ($index, $value)
		1771
519	This is a family of methods to set the kernel argument with the number C<$index> to the give C<$value>.	1772	This is a family of methods to set the kernel argument with the number
520		1773	C<$index> to the give C<$value>.
521	TYPE is one of C<char>, C<uchar>, C<short>, C<ushort>, C<int>, C<uint>,
522	C<long>, C<ulong>, C<half>, C<float>, C<double>, C<memory>, C<buffer>,
523	C<image2d>, C<image3d>, C<sampler> or C<event>.
524		1774
525	Chars and integers (including the half type) are specified as integers,	1775	Chars and integers (including the half type) are specified as integers,
526	float and double as floating point values, memory/buffer/image2d/image3d	1776	float and double as floating point values, memory/buffer/image must be
527	must be an object of that type or C<undef>, and sampler and event must be	1777	an object of that type or C<undef>, local-memory arguments are set by
528	objects of that type.	1778	specifying the size, and sampler and event must be objects of that type.
		1779
		1780	Note that C<set_memory> works for all memory objects (all types of buffers
		1781	and images) - the main purpose of the more specific C<set_TYPE> functions
		1782	is type checking.
		1783
		1784	Setting an argument for a kernel does NOT keep a reference to the object -
		1785	for example, if you set an argument to some image object, free the image,
		1786	and call the kernel, you will run into undefined behaviour.
529		1787
530	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>	1788	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetKernelArg.html>
531		1789
532	=back	1790	=back
533		1791
…		…
536	This is the superclass for all event objects (including OpenCL::UserEvent	1794	This is the superclass for all event objects (including OpenCL::UserEvent
537	objects).	1795	objects).
538		1796
539	=over 4	1797	=over 4
540		1798
		1799	=item $ev->wait
		1800
		1801	Waits for the event to complete.
		1802
		1803	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>
		1804
		1805	=item $ev->cb ($exec_callback_type, $callback->($event, $event_command_exec_status))
		1806
		1807	Adds a callback to the callback stack for the given event type. There is
		1808	no way to remove a callback again.
		1809
		1810	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetEventCallback.html>
		1811
541	=item $packed_value = $ev->info ($name)	1812	=item $packed_value = $ev->info ($name)
542		1813
543	See C<< $platform->info >> for details.	1814	See C<< $platform->info >> for details.
544		1815
545	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>	1816	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetEventInfo.html>
546		1817
547	=item $ev->wait	1818	=for gengetinfo begin event
548		1819
549	Waits for the event to complete.	1820	=item $queue = $event->command_queue
550		1821
		1822	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_QUEUE> and returns the result.
		1823
		1824	=item $command_type = $event->command_type
		1825
		1826	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_TYPE> and returns the result.
		1827
		1828	=item $uint = $event->reference_count
		1829
		1830	Calls C<clGetEventInfo> with C<CL_EVENT_REFERENCE_COUNT> and returns the result.
		1831
		1832	=item $uint = $event->command_execution_status
		1833
		1834	Calls C<clGetEventInfo> with C<CL_EVENT_COMMAND_EXECUTION_STATUS> and returns the result.
		1835
		1836	=item $ctx = $event->context
		1837
		1838	Calls C<clGetEventInfo> with C<CL_EVENT_CONTEXT> and returns the result.
		1839
		1840	=for gengetinfo end event
		1841
		1842	=item $packed_value = $ev->profiling_info ($name)
		1843
		1844	See C<< $platform->info >> for details.
		1845
		1846	The reason this method is not called C<info> is that there already is an
		1847	C<< ->info >> method.
		1848
551	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clWaitForEvents.html>	1849	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProfilingInfo.html>
		1850
		1851	=for gengetinfo begin profiling
		1852
		1853	=item $ulong = $event->profiling_command_queued
		1854
		1855	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_QUEUED> and returns the result.
		1856
		1857	=item $ulong = $event->profiling_command_submit
		1858
		1859	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_SUBMIT> and returns the result.
		1860
		1861	=item $ulong = $event->profiling_command_start
		1862
		1863	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_START> and returns the result.
		1864
		1865	=item $ulong = $event->profiling_command_end
		1866
		1867	Calls C<clGetEventProfilingInfo> with C<CL_PROFILING_COMMAND_END> and returns the result.
		1868
		1869	=for gengetinfo end profiling
552		1870
553	=back	1871	=back
554		1872
555	=head2 THE OpenCL::UserEvent CLASS	1873	=head2 THE OpenCL::UserEvent CLASS
556		1874
…		…
558		1876
559	=over 4	1877	=over 4
560		1878
561	=item $ev->set_status ($execution_status)	1879	=item $ev->set_status ($execution_status)
562		1880
		1881	Sets the execution status of the user event. Can only be called once,
		1882	either with OpenCL::COMPLETE or a negative number as status.
		1883
563	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>	1884	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clSetUserEventStatus.html>
564		1885
565	=back	1886	=back
566		1887
567	=cut	1888	=cut
568
569	package OpenCL;
570
571	use common::sense;
572
573	BEGIN {
574	our $VERSION = '0.03';
575
576	require XSLoader;
577	XSLoader::load (__PACKAGE__, $VERSION);
578
579	@OpenCL::Buffer::ISA =
580	@OpenCL::Image::ISA = OpenCL::Memory::;
581
582	@OpenCL::Image2D::ISA =
583	@OpenCL::Image3D::ISA = OpenCL::Image::;
584
585	@OpenCL::UserEvent::ISA = OpenCL::Event::;
586	}
587		1889
588	1;	1890	1;
589		1891
590	=head1 AUTHOR	1892	=head1 AUTHOR
591		1893

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