File threads.h¶
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namespace
lsst
Class for a simple mapping implementing a generic AstrometryTransform.
Remove all non-astronomical counts from the Chunk Exposure’s pixels.
Forward declarations for lsst::utils::Cache
For details on the Cache class, see the Cache.h file.
It uses a template rather than a pointer so that the derived classes can use the specifics of the transform. The class simplePolyMapping overloads a few routines.
A base class for image defects
Numeric constants used by the Integrate.h integrator routines.
Compute Image Statistics
- Note
Gauss-Kronrod-Patterson quadrature coefficients for use in quadpack routine qng. These coefficients were calculated with 101 decimal digit arithmetic by L. W. Fullerton, Bell Labs, Nov 1981.
- Note
The Statistics class itself can only handle lsst::afw::image::MaskedImage() types. The philosophy has been to handle other types by making them look like lsst::afw::image::MaskedImage() and reusing that code. Users should have no need to instantiate a Statistics object directly, but should use the overloaded makeStatistics() factory functions.
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namespace
base
Functions
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bool
haveThreads
()¶ Are threaded packages available?
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void
setNumThreads
(unsigned int numThreads)¶ Set number of threads to use
- Exceptions
NoThreadsException
: if no threading library is available
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unsigned int
getNumThreads
()¶ Get maximum number of threads we might use
Returns the maximum value of the number of threads being used by the threading libraries that are available.
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bool
disableImplicitThreading
()¶ Disable threading that has not been set explicitly
Some threaded packages implicitly use multiple threads if the user doesn’t explicitly state the number of desired threads. However, this can interfere with operations that are parallelised at a higher level. This function will disable threading unless the user has explicitly specified the number of desired threads through environment variables.
This behavior may be disabled by setting the environment variable specified by allowEnvvar.
This is principally intended for Linux machines (we explicitly load .so dynamic libraries); MacOS has its own way of doing threading (Grand Central Dispatch) that throttles threads to avoid overwhelming the machine.
@ return whether we disabled threading
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class
NoThreadsException
: public runtime_error - #include <threads.h>
No threading library is available.
Public Functions
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NoThreadsException
()
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bool