From 27a0448bfb25471872fb7feff7115f9498ad2109 Mon Sep 17 00:00:00 2001
From: Marius Isken <marius.isken@gfz-potsdam.de>
Date: Sun, 24 Oct 2021 20:13:40 +0200
Subject: [PATCH] planer: constant reference to plan

---
 fftw/src/plan.rs | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/fftw/src/plan.rs b/fftw/src/plan.rs
index 7cf4cd56..63952b39 100644
--- a/fftw/src/plan.rs
+++ b/fftw/src/plan.rs
@@ -36,6 +36,8 @@ pub struct Plan<A, B, Plan: PlanSpec> {
     phantom: PhantomData<(A, B)>,
 }
 
+unsafe impl<A: Sync, B: Sync> Sync for Plan<A, B, Plan32> {}
+unsafe impl<A: Sync, B: Sync> Sync for Plan<A, B, Plan64> {}
 unsafe impl<A: Send, B: Send> Send for Plan<A, B, Plan32> {}
 unsafe impl<A: Send, B: Send> Send for Plan<A, B, Plan64> {}
 
@@ -97,7 +99,7 @@ pub trait C2CPlan: Sized {
     ) -> Result<Self>;
 
     /// Execute complex-to-complex transform
-    fn c2c(&mut self, in_: &mut [Self::Complex], out: &mut [Self::Complex]) -> Result<()>;
+    fn c2c(&self, in_: &mut [Self::Complex], out: &mut [Self::Complex]) -> Result<()>;
 }
 
 /// Trait for the plan of Real-to-Complex transformation
@@ -124,7 +126,7 @@ pub trait R2CPlan: Sized {
     ) -> Result<Self>;
 
     /// Execute real-to-complex transform
-    fn r2c(&mut self, in_: &mut [Self::Real], out: &mut [Self::Complex]) -> Result<()>;
+    fn r2c(&self, in_: &mut [Self::Real], out: &mut [Self::Complex]) -> Result<()>;
 }
 
 /// Trait for the plan of Complex-to-Real transformation
@@ -151,7 +153,7 @@ pub trait C2RPlan: Sized {
     ) -> Result<Self>;
 
     /// Execute complex-to-real transform
-    fn c2r(&mut self, in_: &mut [Self::Complex], out: &mut [Self::Real]) -> Result<()>;
+    fn c2r(&self, in_: &mut [Self::Complex], out: &mut [Self::Real]) -> Result<()>;
 }
 
 pub trait R2RPlan: Sized {
@@ -175,7 +177,7 @@ pub trait R2RPlan: Sized {
     ) -> Result<Self>;
 
     /// Execute complex-to-complex transform
-    fn r2r(&mut self, in_: &mut [Self::Real], out: &mut [Self::Real]) -> Result<()>;
+    fn r2r(&self, in_: &mut [Self::Real], out: &mut [Self::Real]) -> Result<()>;
 }
 
 macro_rules! impl_c2c {
@@ -204,7 +206,7 @@ macro_rules! impl_c2c {
                     phantom: PhantomData,
                 })
             }
-            fn c2c(&mut self, in_: &mut [Self::Complex], out: &mut [Self::Complex]) -> Result<()> {
+            fn c2c(&self, in_: &mut [Self::Complex], out: &mut [Self::Complex]) -> Result<()> {
                 self.check(in_, out)?;
                 unsafe { $exec(self.plan, in_.as_mut_ptr(), out.as_mut_ptr()) };
                 Ok(())
@@ -242,7 +244,7 @@ macro_rules! impl_r2c {
                     phantom: PhantomData,
                 })
             }
-            fn r2c(&mut self, in_: &mut [Self::Real], out: &mut [Self::Complex]) -> Result<()> {
+            fn r2c(&self, in_: &mut [Self::Real], out: &mut [Self::Complex]) -> Result<()> {
                 self.check(in_, out)?;
                 unsafe { $exec(self.plan, in_.as_mut_ptr(), out.as_mut_ptr()) };
                 Ok(())
@@ -280,7 +282,7 @@ macro_rules! impl_c2r {
                     phantom: PhantomData,
                 })
             }
-            fn c2r(&mut self, in_: &mut [Self::Complex], out: &mut [Self::Real]) -> Result<()> {
+            fn c2r(&self, in_: &mut [Self::Complex], out: &mut [Self::Real]) -> Result<()> {
                 self.check(in_, out)?;
                 unsafe { $exec(self.plan, in_.as_mut_ptr(), out.as_mut_ptr()) };
                 Ok(())
@@ -318,7 +320,7 @@ macro_rules! impl_r2r {
                     phantom: PhantomData,
                 })
             }
-            fn r2r(&mut self, in_: &mut [Self::Real], out: &mut [Self::Real]) -> Result<()> {
+            fn r2r(&self, in_: &mut [Self::Real], out: &mut [Self::Real]) -> Result<()> {
                 self.check(in_, out)?;
                 unsafe { $exec(self.plan, in_.as_mut_ptr(), out.as_mut_ptr()) };
                 Ok(())