forked from jgillich/go-opencl
/
cl.go
60 lines (55 loc) · 2.07 KB
/
cl.go
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/*
Package cl provides a binding to the OpenCL api. It's mostly a low-level
wrapper that avoids adding functionality while still making the interface
a little more friendly and easy to use.
Resource life-cycle management:
For any CL object that gets created (buffer, queue, kernel, etc..) you should
call object.Release() when finished with it to free the CL resources. This
explicitely calls the related clXXXRelease method for the type. However,
as a fallback there is a finalizer set for every resource item that takes
care of it (eventually) if Release isn't called. In this way you can have
better control over the life cycle of resources while having a fall back
to avoid leaks. This is similar to how file handles and such are handled
in the Go standard packages.
*/
package cl
// #cgo linux pkg-config: OpenCL
// #cgo darwin LDFLAGS: -framework OpenCL
// #cgo windows LDFLAGS: -lOpenCL
import "C"
import (
"errors"
"fmt"
"reflect"
"unsafe"
)
// ErrUnsupported is the error returned when some functionality is not supported
var ErrUnsupported = errors.New("cl: unsupported")
// Ptr supports basic C ptr types not including structs or arrays of ptrs
func Ptr(data interface{}) unsafe.Pointer {
if data == nil {
return unsafe.Pointer(nil)
}
var addr unsafe.Pointer
v := reflect.ValueOf(data)
switch v.Type().Kind() {
case reflect.Ptr:
e := v.Elem()
switch e.Kind() {
case
reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
reflect.Float32, reflect.Float64:
addr = unsafe.Pointer(e.UnsafeAddr())
default:
panic(fmt.Errorf("unsupported pointer to type %s; must be a slice or pointer to a singular scalar value or the first element of an array or slice", e.Kind()))
}
case reflect.Uintptr:
addr = unsafe.Pointer(data.(uintptr))
case reflect.Slice:
addr = unsafe.Pointer(v.Index(0).UnsafeAddr())
default:
panic(fmt.Errorf("unsupported type %s; must be a slice or pointer to a singular scalar value or the first element of an array or slice", v.Type()))
}
return addr
}