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Revision 1.10 by root, Thu Nov 17 02:10:39 2011 UTC vs.
Revision 1.64 by root, Mon Apr 30 23:12:43 2012 UTC

…		…
18	vendors) - usually there is only one.	18	vendors) - usually there is only one.
19		19
20	Each platform gives you access to a number of OpenCL::Device objects, e.g.	20	Each platform gives you access to a number of OpenCL::Device objects, e.g.
21	your graphics card.	21	your graphics card.
22		22
23	From a platform and some devices, you create an OpenCL::Context, which is	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	24	a very central object in OpenCL: Once you have a context you can create
25	most other objects:	25	most other objects:
26		26
27	OpenCL::Program objects, which store source code and, after building	27	OpenCL::Program objects, which store source code and, after building for a
28	("compiling and linking"), also binary programs. For each kernel function	28	specific device ("compiling and linking"), also binary programs. For each
29	in a program you can then create an OpenCL::Kernel object which represents	29	kernel function in a program you can then create an OpenCL::Kernel object
30	basically a function call with argument values.	30	which represents basically a function call with argument values.
31		31
32	OpenCL::Memory objects of various flavours: OpenCL::Buffers objects (flat	32	OpenCL::Memory objects of various flavours: OpenCL::Buffer objects (flat
33	memory areas, think array) and OpenCL::Image objects (think 2d or 3d	33	memory areas, think arrays or structs) and OpenCL::Image objects (think 2d
34	array) for bulk data and input and output for kernels.	34	or 3d array) for bulk data and input and output for kernels.
35		35
36	OpenCL::Sampler objects, which are kind of like texture filter modes in	36	OpenCL::Sampler objects, which are kind of like texture filter modes in
37	OpenGL.	37	OpenGL.
38		38
39	OpenCL::Queue objects - command queues, which allow you to submit memory	39	OpenCL::Queue objects - command queues, which allow you to submit memory
…		…
43		43
44	OpenCL::Event objects are used to signal when something is complete.	44	OpenCL::Event objects are used to signal when something is complete.
45		45
46	=head2 HELPFUL RESOURCES	46	=head2 HELPFUL RESOURCES
47		47
48	The OpenCL spec used to develop this module (1.2 spec was available, but	48	The OpenCL specs used to develop this module:
49	no implementation was available to me :).
50		49
51	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
52		53
53	OpenCL manpages:	54	OpenCL manpages:
54		55
55	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
56		73
57	=head1 BASIC WORKFLOW	74	=head1 BASIC WORKFLOW
58		75
59	To get something done, you basically have to do this once:	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):
60		78
61	Find some platform (e.g. the first one) and some device (e.g. the first	79	Find some platform (e.g. the first one) and some device(s) (e.g. the first
62	device you can find), and create a context from those.	80	device of the platform), and create a context from those.
63		81
64	Create a command queue from your context, and program objects from your	82	Create program objects from your OpenCL source code, then build (compile)
65	OpenCL source code, build the programs.	83	the programs for each device you want to run them on.
66		84
67	Create kernel objects for all kernels you want to use.	85	Create kernel objects for all kernels you want to use (surprisingly, these
		86	are not device-specific).
68		87
69	Then, to execute stuff, you repeat this:	88	Then, to execute stuff, you repeat these steps, possibly resuing or
		89	sharing some buffers:
70		90
71	Create some input and output buffers from your context. Initialise the	91	Create some input and output buffers from your context. Set these as
72	input buffers with data. Set these as arguments to your kernel.	92	arguments to your kernel.
		93
		94	Enqueue buffer writes to initialise your input buffers (when not
		95	initialised at creation time).
73		96
74	Enqueue the kernel execution.	97	Enqueue the kernel execution.
75		98
76	Enqueue buffer reads for your output buffer to read results.	99	Enqueue buffer reads for your output buffer to read results.
77		100
78	The next section shows how this can be done.
79
80	=head1 EXAMPLES	101	=head1 EXAMPLES
81		102
82	=head2 Enumerate all devices and get contexts for them.	103	=head2 Enumerate all devices and get contexts for them.
83		104
		105	Best run this once to get a feel for the platforms and devices in your
		106	system.
		107
84	for my $platform (OpenCL::platforms) {	108	for my $platform (OpenCL::platforms) {
85	printf "platform: %s\n", $platform->info (OpenCL::PLATFORM_NAME);	109	printf "platform: %s\n", $platform->name;
86	printf "extensions: %s\n", $platform->info (OpenCL::PLATFORM_EXTENSIONS);	110	printf "extensions: %s\n", $platform->extensions;
87	for my $device ($platform->devices) {	111	for my $device ($platform->devices) {
88	printf "+ device: %s\n", $device->info (OpenCL::DEVICE_NAME);	112	printf "+ device: %s\n", $device->name;
89	my $ctx = $device->context;	113	my $ctx = $platform->context (undef, [$device]);
90	# do stuff	114	# do stuff
91	}	115	}
92	}	116	}
93		117
94	=head2 Get a useful context and a command queue.	118	=head2 Get a useful context and a command queue.
95		119
96	my $dev = ((OpenCL::platforms)[0]->devices)[0];	120	This is a useful boilerplate for any OpenCL program that only wants to use
97	my $ctx = $dev->context;	121	one device,
98	my $queue = $ctx->queue ($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
99		127
100	=head2 Print all supported image formats of a context.	128	=head2 Print all supported image formats of a context.
		129
		130	Best run this once for your context, to see whats available and how to
		131	gather information.
101		132
102	for my $type (OpenCL::MEM_OBJECT_IMAGE2D, OpenCL::MEM_OBJECT_IMAGE3D) {	133	for my $type (OpenCL::MEM_OBJECT_IMAGE2D, OpenCL::MEM_OBJECT_IMAGE3D) {
103	print "supported image formats for ", OpenCL::enum2str $type, "\n";	134	print "supported image formats for ", OpenCL::enum2str $type, "\n";
104		135
105	for my $f ($ctx->supported_image_formats (0, $type)) {	136	for my $f ($ctx->supported_image_formats (0, $type)) {
…		…
110	=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,
111	then asynchronously.	142	then asynchronously.
112		143
113	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");	144	my $buf = $ctx->buffer_sv (OpenCL::MEM_COPY_HOST_PTR, "helmut");
114		145
115	$queue->enqueue_read_buffer ($buf, 1, 1, 3, my $data);	146	$queue->read_buffer ($buf, 1, 1, 3, my $data);
116	print "$data\n";	147	print "$data\n";
117		148
118	my $ev = $queue->enqueue_read_buffer ($buf, 0, 1, 3, my $data);	149	my $ev = $queue->read_buffer ($buf, 0, 1, 3, my $data);
119	$ev->wait;	150	$ev->wait;
120	print "$data\n"; # prints "elm"	151	print "$data\n"; # prints "elm"
121		152
122	=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
123	functions.	154	functions.
124		155
125	my $src = '	156	my $src = '
126	__kernel void	157	kernel void
127	squareit (__global float *input, __global float *output)	158	squareit (global float *input, global float *output)
128	{	159	{
129	size_t id = get_global_id (0);	160	$id = get_global_id (0);
130	output [id] = input [id] * input [id];	161	output [id] = input [id] * input [id];
131	}	162	}
132	';	163	';
133		164
134	my $prog = $ctx->program_with_source ($src);	165	my $prog = $ctx->build_program ($src);
135
136	eval { $prog->build ($dev); 1 }
137	or die $prog->build_info ($dev, OpenCL::PROGRAM_BUILD_LOG);
138
139	my $kernel = $prog->kernel ("squareit");	166	my $kernel = $prog->kernel ("squareit");
140		167
141	=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.
142		170
143	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);
144	my $output = $ctx->buffer (0, OpenCL::SIZEOF_FLOAT * 5);	172	my $output = $ctx->buffer (0, OpenCL::SIZEOF_FLOAT * 5);
145		173
146	# set buffer	174	# set buffer
147	$kernel->set_buffer (0, $input);	175	$kernel->set_buffer (0, $input);
148	$kernel->set_buffer (1, $output);	176	$kernel->set_buffer (1, $output);
149		177
150	# execute it for all 4 numbers	178	# execute it for all 4 numbers
151	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	179	$queue->nd_range_kernel ($kernel, undef, [4], undef);
152		180
153	# enqueue a synchronous read	181	# enqueue a synchronous read
154	$queue->enqueue_read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	182	$queue->read_buffer ($output, 1, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
155		183
156	# print the results:	184	# print the results:
157	printf "%s\n", join ", ", unpack "f*", $data;	185	printf "%s\n", join ", ", unpack "f*", $data;
158		186
159	=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,
160	showing off barriers.	188	showing off barriers.
161		189
162	# execute it for all 4 numbers	190	# execute it for all 4 numbers
163	$queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	191	$queue->nd_range_kernel ($kernel, undef, [4], undef);
164		192
165	# enqueue a barrier to ensure in-order execution	193	# enqueue a barrier to ensure in-order execution
166	$queue->enqueue_barrier;	194	$queue->barrier;
167		195
168	# enqueue an async read	196	# enqueue an async read
169	$queue->enqueue_read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);	197	$queue->read_buffer ($output, 0, 0, OpenCL::SIZEOF_FLOAT * 4, my $data);
170		198
171	# wait for all requests to finish	199	# wait for all requests to finish
172	$queue->finish;	200	$queue->finish;
173		201
174	=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,
175	showing off event objects and wait lists.	203	showing off event objects and wait lists.
176		204
177	# execute it for all 4 numbers	205	# execute it for all 4 numbers
178	my $ev = $queue->enqueue_nd_range_kernel ($kernel, undef, [4], undef);	206	my $ev = $queue->nd_range_kernel ($kernel, undef, [4], undef);
179		207
180	# enqueue an async read	208	# enqueue an async read
181	$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);
182		210
183	# wait for the last event to complete	211	# wait for the last event to complete
184	$ev->wait;	212	$ev->wait;
185		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
186	=head1 DOCUMENTATION	310	=head1 DOCUMENTATION
187		311
188	=head2 BASIC CONVENTIONS	312	=head2 BASIC CONVENTIONS
189		313
190	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
191	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
192	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
193	differences between the OpenCL C API and this module:	317	differences between the OpenCL C API and this module:
194		318
195	=over 4	319	=over 4
196		320
197	=item * Object lifetime managament is automatic - there is no need	321	=item * Object lifetime managament is automatic - there is no need
198	to free objects explicitly (C<clReleaseXXX>), the release function	322	to free objects explicitly (C<clReleaseXXX>), the release function
199	is called automatically once all Perl references to it go away.	323	is called automatically once all Perl references to it go away.
200		324
201	=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
202	while this module uses underscores as word separator and often leaves out	327	uses underscores as word separator and often leaves out prefixes
203	prefixes (C<< $platform->info >>).	328	(C<OpenCL::platforms>, C<< $platform->info >>).
204		329
205	=item * OpenCL often specifies fixed vector function arguments as short	330	=item * OpenCL often specifies fixed vector function arguments as short
206	arrays (C<size_t origin[3]>), while this module explicitly expects the	331	arrays (C<size_t origin[3]>), while this module explicitly expects the
207	components as separate arguments-	332	components as separate arguments (C<$orig_x, $orig_y, $orig_z>) in
		333	function calls.
208		334
209	=item * Where possible, one of the pitch values is calculated from the	335	=item * Structures are often specified by flattening out their components
210	perl scalar length and need not be specified.	336	as with short vectors, and returned as arrayrefs.
211		337
212	=item * When enqueuing commands, the wait list is specified by adding	338	=item * When enqueuing commands, the wait list is specified by adding
213	extra arguments to the function - anywhere a C<$wait_events...> argument	339	extra arguments to the function - anywhere a C<$wait_events...> argument
214	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.
215		343
216	=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
217	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
218	by the method.	346	by the method.
219		347
…		…
239	ulong IV - Q	367	ulong IV - Q
240	float NV float f	368	float NV float f
241	half IV ushort S	369	half IV ushort S
242	double NV double d	370	double NV double d
243		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
244	=head2 THE OpenCL PACKAGE	537	=head2 THE OpenCL PACKAGE
245		538
246	=over 4	539	=over 4
247		540
248	=item $int = OpenCL::errno	541	=item $int = OpenCL::errno
249		542
250	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.
251		545
252	=item $str = OpenCL::err2str $errval	546	=item $str = OpenCL::err2str [$errval]
253		547
254	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).
255		550
256	=item $str = OpenCL::enum2str $enum	551	=item $str = OpenCL::enum2str $enum
257		552
258	Converts most enum values (inof parameter names, image format constants,	553	Converts most enum values (of parameter names, image format constants,
259	object types, addressing and filter modes, command types etc.) into a	554	object types, addressing and filter modes, command types etc.) into a
260	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
261	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
262	string out of it.	557	string out of it.
263		558
264	=item @platforms = OpenCL::platforms	559	=item @platforms = OpenCL::platforms
265		560
266	Returns all available OpenCL::Platform objects.	561	Returns all available OpenCL::Platform objects.
267		562
268	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>
269		564
270	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef	565	=item $ctx = OpenCL::context_from_type $properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $callback->($err, $pvt) = $print_stderr
271		566
272	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.
273		568
274	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>
275		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
276	=item OpenCL::wait_for_events $wait_events...	578	=item OpenCL::wait_for_events $wait_events...
277		579
278	Waits for all events to complete.	580	Waits for all events to complete.
279		581
280	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>
281		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
282	=back	621	=back
283		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
284	=head2 THE OpenCL::Platform CLASS	648	=head2 THE OpenCL::Platform CLASS
285		649
286	=over 4	650	=over 4
287		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
288	=item $packed_value = $platform->info ($name)	669	=item $packed_value = $platform->info ($name)
289		670
290	Calls C<clGetPlatformInfo> and returns the packed, raw value - for	671	Calls C<clGetPlatformInfo> and returns the packed, raw value - for
291	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
292	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.
293		677
294	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>
295		679
296	=item @devices = $platform->devices ($type = OpenCL::DEVICE_TYPE_ALL)	680	=item $platform->unload_compiler
297		681
298	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.
299		684
300	=item $ctx = $platform->context_from_type ($properties, $type = OpenCL::DEVICE_TYPE_DEFAULT, $notify = undef)
301
302	Tries to create a context. Never worked for me.
303
304	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
305		710
306	=back	711	=back
307		712
308	=head2 THE OpenCL::Device CLASS	713	=head2 THE OpenCL::Device CLASS
309		714
…		…
313		718
314	See C<< $platform->info >> for details.	719	See C<< $platform->info >> for details.
315		720
316	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>
317		722
318	=item $ctx = $device->context ($properties = undef, $notify = undef)	723	=for gengetinfo begin device
319		724
320	Create a new OpenCL::Context object.	725	=item $device_type = $device->type
321		726
322	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clCreateContext.html>	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
		821	=item $uint = $device->max_samplers
		822
		823	Calls C<clGetDeviceInfo> with C<CL_DEVICE_MAX_SAMPLERS> and returns the result.
		824
		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
323		990
324	=back	991	=back
325		992
326	=head2 THE OpenCL::Context CLASS	993	=head2 THE OpenCL::Context CLASS
327		994
328	=over 4	995	=over 4
329		996
330	=item $packed_value = $ctx->info ($name)	997	=item $prog = $ctx->build_program ($program, $options = "")
331		998
332	See C<< $platform->info >> for details.	999	This convenience function tries to build the program on all devices in
		1000	the context. If the build fails, then the function will C<croak> with the
		1001	build log. Otherwise ti returns the program object.
333		1002
334	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetContextInfo.html>	1003	The C<$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.
		1006
		1007	=cut
		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	}
335		1029
336	=item $queue = $ctx->queue ($device, $properties)	1030	=item $queue = $ctx->queue ($device, $properties)
337		1031
338	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.
339		1033
340	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>
341		1035
		1036	Example: create an out-of-order queue.
		1037
		1038	$queue = $ctx->queue ($device, OpenCL::QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE);
		1039
342	=item $ev = $ctx->user_event	1040	=item $ev = $ctx->user_event
343		1041
344	Creates a new OpenCL::UserEvent object.	1042	Creates a new OpenCL::UserEvent object.
345		1043
346	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>
347		1045
348	=item $buf = $ctx->buffer ($flags, $len)	1046	=item $buf = $ctx->buffer ($flags, $len)
349		1047
350	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.
351		1050
352	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>
353		1052
354	=item $buf = $ctx->buffer_sv ($flags, $data)	1053	=item $buf = $ctx->buffer_sv ($flags, $data)
355		1054
356	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.
357		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
358	=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)
359		1066
360	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.
361		1069
362	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>
363		1071
364	=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)
365		1073
366	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.
367		1076
368	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
369		1113
370	=item @formats = $ctx->supported_image_formats ($flags, $image_type)	1114	=item @formats = $ctx->supported_image_formats ($flags, $image_type)
371		1115
372	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
373	two values, $channel_order and $channel_type, in it.	1117	two values, $channel_order and $channel_type, in it.
…		…
384		1128
385	Creates a new OpenCL::Program object from the given source code.	1129	Creates a new OpenCL::Program object from the given source code.
386		1130
387	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>
388		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 = $context->num_devices
		1154
		1155	Calls C<clGetContextInfo> with C<CL_CONTEXT_NUM_DEVICES> and returns the result.
		1156
		1157	=for gengetinfo end context
		1158
389	=back	1159	=back
390		1160
391	=head2 THE OpenCL::Queue CLASS	1161	=head2 THE OpenCL::Queue CLASS
392		1162
393	An OpenCL::Queue represents an execution queue for OpenCL. You execute	1163	An OpenCL::Queue represents an execution queue for OpenCL. You execute
394	requests by calling their respective C<enqueue_xxx> method and waitinf for	1164	requests by calling their respective method and waiting for it to complete
395	it to complete in some way.	1165	in some way.
396		1166
397	All the enqueue methods return an event object that can be used to wait	1167	Most methods that enqueue some request return an event object that can
398	for completion, unless the method is called in void context, in which case	1168	be used to wait for completion (optionally using a callback), unless
399	no event object is created.	1169	the method is called in void context, in which case no event object is
		1170	created.
400		1171
401	They also allow you to specify any number of other event objects that this	1172	They also allow you to specify any number of other event objects that this
402	request has to wait for before it starts executing, by simply passing the	1173	request has to wait for before it starts executing, by simply passing the
403	event objects as extra parameters to the enqueue methods.	1174	event objects as extra parameters to the enqueue methods. To simplify
		1175	program design, this module ignores any C<undef> values in the list of
		1176	events. This makes it possible to code operations such as this, without
		1177	having to put a valid event object into C<$event> first:
		1178
		1179	$event = $queue->xxx (..., $event);
404		1180
405	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
406	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
407	create event objects.	1183	create event objects, althoguh an our of order queue is often a bit
		1184	faster.
408		1185
409	=over 4	1186	=over 4
410		1187
411	=item $packed_value = $ctx->info ($name)
412
413	See C<< $platform->info >> for details.
414
415	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetCommandQueueInfo.html>
416
417	=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...)
418		1189
419	Reads data from buffer into the given string.	1190	Reads data from buffer into the given string.
420		1191
421	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>
422		1193
423	=item $ev = $queue->enqueue_write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)	1194	=item $ev = $queue->write_buffer ($buffer, $blocking, $offset, $data, $wait_events...)
424		1195
425	Writes data to buffer from the given string.	1196	Writes data to buffer from the given string.
426		1197
427	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>
428		1199
429	=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...)
430		1201
431	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>
432		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
433	=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...)
434		1217
435	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>
436		1219
437	=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...)
438		1221
439	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>
440		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
441	=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...)
442		1233
443	Yeah.	1234	Yeah.
444		1235
445	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyBufferRect.html>
446
447	=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, ...)
448
449	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>.
450		1237
451	=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, $size, ...)
452		1239
		1240	Fills the given buffer object with repeated applications of C<$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
453	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>
454		1253
455	=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, ...)
456
457	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueCopyImageToBuffer.html>
458
459	=item $ev = $queue->enqueue_task ($kernel, $wait_events...)	1254	=item $ev = $queue->task ($kernel, $wait_events...)
460		1255
461	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>
462		1257
463	=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, $wait_events...)
464		1259
465	Enqueues a kernel execution.	1260	Enqueues a kernel execution.
466		1261
467	@$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
468	integers specifying the work sizes (element counts).	1263	integers specifying the work sizes (element counts).
469		1264
470	@$global_work_offset must be either C<undef> (in which case all offsets	1265	\@global_work_offset must be either C<undef> (in which case all offsets
471	are C<0>), or a reference to an array of work offsets, with the same number	1266	are C<0>), or a reference to an array of work offsets, with the same number
472	of elements as @$global_work_size.	1267	of elements as \@global_work_size.
473		1268
474	@$local_work_size must be either C<undef> (in which case the	1269	\@local_work_size must be either C<undef> (in which case the
475	implementation is supposed to choose good local work sizes), or a	1270	implementation is supposed to choose good local work sizes), or a
476	reference to an array of local work sizes, with the same number of	1271	reference to an array of local work sizes, with the same number of
477	elements as @$global_work_size.	1272	elements as \@global_work_size.
478		1273
479	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>
480		1275
481	=item $ev = $queue->enqueue_marker	1276	=item $ev = $queue->acquire_gl_objects ([object, ...], $wait_events...)
482		1277
		1278	Enqueues a list (an array-ref of OpenCL::Memory objects) to be acquired
		1279	for subsequent OpenCL usage.
		1280
483	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>
484		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
485	=item $ev = $queue->enqueue_wait_for_events ($wait_events...)	1290	=item $ev = $queue->wait_for_events ($wait_events...)
486		1291
487	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>
488		1293
489	=item $queue->enqueue_barrier	1294	=item $ev = $queue->marker ($wait_events...)
490		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
491	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>
492		1301
493	=item $queue->flush	1302	=item $queue->flush
494		1303
495	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>
496		1305
497	=item $queue->finish	1306	=item $queue->finish
498		1307
499	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>
500		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
501	=back	1336	=back
502		1337
503	=head2 THE OpenCL::Memory CLASS	1338	=head2 THE OpenCL::Memory CLASS
504		1339
505	This the superclass of all memory objects - OpenCL::Buffer, OpenCL::Image,	1340	This the superclass of all memory objects - OpenCL::Buffer, OpenCL::Image,
506	OpenCL::Image2D and OpenCL::Image3D. The subclasses of this class	1341	OpenCL::Image2D and OpenCL::Image3D.
507	currently only exist to allow type-checking.
508		1342
509	=over 4	1343	=over 4
510		1344
511	=item $packed_value = $memory->info ($name)	1345	=item $packed_value = $memory->info ($name)
512		1346
513	See C<< $platform->info >> for details.	1347	See C<< $platform->info >> for details.
514		1348
515	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>
516		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
517	=back	1398	=back
518		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
519	=head2 THE OpenCL::Sampler CLASS	1487	=head2 THE OpenCL::Sampler CLASS
520		1488
521	=over 4	1489	=over 4
522		1490
523	=item $packed_value = $sampler->info ($name)	1491	=item $packed_value = $sampler->info ($name)
524		1492
525	See C<< $platform->info >> for details.	1493	See C<< $platform->info >> for details.
526		1494
527	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>
528		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
529	=back	1521	=back
530		1522
531	=head2 THE OpenCL::Program CLASS	1523	=head2 THE OpenCL::Program CLASS
532		1524
533	=over 4	1525	=over 4
534		1526
535	=item $packed_value = $program->info ($name)	1527	=item $program->build (\@devices = undef, $options = "", $cb->($program) = undef)
536		1528
537	See C<< $platform->info >> for details.
538
539	L<http://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetProgramInfo.html>
540
541	=item $program->build ($device, $options = "")
542
543	Tries to build the program with the givne options.	1529	Tries to build the program with the given options. See also the
		1530	C<$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.
544		1544
545	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).
546		1551
547	=item $packed_value = $program->build_info ($device, $name)	1552	=item $packed_value = $program->build_info ($device, $name)
548		1553
549	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
550	build attempt for the given device.	1555	build attempt for the given device.
…		…
556	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
557	the program.	1562	the program.
558		1563
559	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>
560		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
561	=back	1633	=back
562		1634
563	=head2 THE OpenCL::Kernel CLASS	1635	=head2 THE OpenCL::Kernel CLASS
564		1636
565	=over 4	1637	=over 4
…		…
568		1640
569	See C<< $platform->info >> for details.	1641	See C<< $platform->info >> for details.
570		1642
571	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>
572		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
573	=item $kernel->set_TYPE ($index, $value)	1736	=item $kernel->set_TYPE ($index, $value)
574		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, $value)
		1771
575	This is a family of methods to set the kernel argument with the number C<$index> to the give C<$value>.	1772	This is a family of methods to set the kernel argument with the number
576		1773	C<$index> to the give C<$value>.
577	TYPE is one of C<char>, C<uchar>, C<short>, C<ushort>, C<int>, C<uint>,
578	C<long>, C<ulong>, C<half>, C<float>, C<double>, C<memory>, C<buffer>,
579	C<image2d>, C<image3d>, C<sampler> or C<event>.
580		1774
581	Chars and integers (including the half type) are specified as integers,	1775	Chars and integers (including the half type) are specified as integers,
582	float and double as floating point values, memory/buffer/image2d/image3d	1776	float and double as floating point values, memory/buffer/image must be
583	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
584	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.
585		1787
586	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>
587		1789
588	=back	1790	=back
589		1791
…		…
592	This is the superclass for all event objects (including OpenCL::UserEvent	1794	This is the superclass for all event objects (including OpenCL::UserEvent
593	objects).	1795	objects).
594		1796
595	=over 4	1797	=over 4
596		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
597	=item $packed_value = $ev->info ($name)	1812	=item $packed_value = $ev->info ($name)
598		1813
599	See C<< $platform->info >> for details.	1814	See C<< $platform->info >> for details.
600		1815
601	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>
602		1817
603	=item $ev->wait	1818	=for gengetinfo begin event
604		1819
605	Waits for the event to complete.	1820	=item $queue = $event->command_queue
606		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
607	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
608		1870
609	=back	1871	=back
610		1872
611	=head2 THE OpenCL::UserEvent CLASS	1873	=head2 THE OpenCL::UserEvent CLASS
612		1874
…		…
614		1876
615	=over 4	1877	=over 4
616		1878
617	=item $ev->set_status ($execution_status)	1879	=item $ev->set_status ($execution_status)
618		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
619	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>
620		1885
621	=back	1886	=back
622		1887
623	=cut	1888	=cut
624
625	package OpenCL;
626
627	use common::sense;
628
629	BEGIN {
630	our $VERSION = '0.03';
631
632	require XSLoader;
633	XSLoader::load (__PACKAGE__, $VERSION);
634
635	@OpenCL::Buffer::ISA =
636	@OpenCL::Image::ISA = OpenCL::Memory::;
637
638	@OpenCL::Image2D::ISA =
639	@OpenCL::Image3D::ISA = OpenCL::Image::;
640
641	@OpenCL::UserEvent::ISA = OpenCL::Event::;
642	}
643		1889
644	1;	1890	1;
645		1891
646	=head1 AUTHOR	1892	=head1 AUTHOR
647		1893

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