Merge pull request #43 from Clonkk/devel

Devel

examples/ex06_tensor.nim

@@ -2,7 +2,7 @@ import arraymancer
 import nimjl
 
 proc main() =
-  Julia.init:
+  Julia.init(1):
     Pkg:
       add "LinearAlgebra"
   # Initialize Julia VM. This should be done once in the lifetime of your program.

examples/ex09_embed_file.nim

@@ -27,7 +27,8 @@ proc main_2() =
 
 proc main_1() =
   # Idiomatic way to embed Julia ressources and call them during after VM Init
-  Julia.init:
+  # The int argument is the number of threads used by the Julia VM
+  Julia.init(2):
     # Install package at init
     Pkg:
       add("LinearAlgebra")

examples/ex10_julia_threads.nim

@@ -0,0 +1,17 @@
+import nimjl
+import std/os
+
+proc main() =
+  # This is the other syntax with dependencies
+  # It is strictly equivalent to
+  # Julia.init(4)
+  # Calling Julia.init() is equivalent to calling Julia.init(1)
+  Julia.init(4):
+    Pkg: add("LinearAlgebra")
+
+  let Threads = jlGetModule("Threads")
+  echo Threads.nthreads()
+  Julia.exit()
+
+when isMainModule:
+  main()

nimjl.nimble

@@ -1,6 +1,6 @@
 # Nimjl
 # Licensed and distributed under MIT license (license terms in the root directory or at http://opensource.org/licenses/MIT).
-version       = "0.7.1"
+version       = "0.7.2"
 author        = "Regis Caillaud"
 description   = "Nim Julia bridge"
 license       = "MIT"

nimjl/cores.nim

@@ -9,7 +9,7 @@ proc jlSym*(symname: string): JlSym =
 
 proc jlExceptionHandler*() =
   let excpt: JlValue = jl_exception_occurred()
-  ## Convert a Julia exception to Nim exception
+   ## Convert a Julia exception to Nim exception
   if not isNil(excpt):
     let msg = $(jl_exception_message())
     raise newException(JlError, msg)
@@ -92,6 +92,10 @@ proc jlVmInit*() =
     return
   # raise newException(JlError, "jl_init() must be called once per process")
 
+proc jlVmInit*(nthreads: int) =
+  putEnv("JULIA_NUM_THREADS", $nthreads)
+  jlVmInit()
+
 # Not exported for now because I don't know how it works
 proc jlVmInit(pathToImage: string) {.used.} =
   ## Same as jlVmInit but with a pre-compiler image

nimjl/glucose.nim

@@ -1,5 +1,6 @@
 # This file is named glucose because it gives you sugar ;)
 # It contains most syntactic sugar to ease using Julia inside Nim
+import std/os
 import ./types
 import ./cores
 import ./functions
@@ -9,10 +10,10 @@ import ./private/jlcores
 
 type Julia* = object
 
-proc init*(jl: type Julia) =
-  jlVmInit()
+proc init*(jl: type Julia, nthreads: int = 1) =
+  jlVmInit(nthreads)
 
-template init*(jl: type Julia, body: untyped) =
+template init*(jl: type Julia, nthreads: int, body: untyped) =
   ## Init Julia VM
   var packages: seq[string]
   template Pkg(innerbody: untyped) =
@@ -42,6 +43,7 @@ template init*(jl: type Julia, body: untyped) =
 
   # Don't do anything if Julia is already initialized
   if not jlVmIsInit():
+    putEnv("JULIA_NUM_THREADS", $nthreads)
     jl_init()
     # Module installation
     Julia.useModule("Pkg")

tests/test_embedressources.nim

@@ -2,7 +2,7 @@ import unittest
 import nimjl
 
 proc testEmbedRessources*() =
-  Julia.init:
+  Julia.init(1):
     Embed:
       file("embed.jl")
       dir("assets/")

tests/testfull.nim

@@ -199,7 +199,7 @@ when defined(checkMemLeak):
   import std/os
 
 when isMainModule:
-  Julia.init:
+  Julia.init(2):
     Pkg: add("LinearAlgebra")
 
   when defined(checkMemLeak):