commit b1aaefe96822a06cc8510b3701bada7edd95c750
author Austin Schuh <austin.linux@gmail.com> Tue Oct 12 22:05:44 2021 -0700
committer Austin Schuh <austin.linux@gmail.com> Tue Oct 12 22:06:09 2021 -0700
tree c9092e1931512ff881c263ca35a53685f681bc5a
parent ac1b775d8bf14d55d07e6489e22cdbdd3192f208

Preallocate dma edge counter array

We can only ever have 4 edge counters due to hardware limits, so let's
just use a sized array.

Change-Id: I07fe7c27b64f2c0878cdc9844dbd304fa7f94d48
Signed-off-by: Austin Schuh <austin.linux@gmail.com>

frc971/wpilib/dma_edge_counting.h

diff --git a/frc971/wpilib/dma_edge_counting.h b/frc971/wpilib/dma_edge_counting.h
index d8fe476..b645d01 100644
--- a/frc971/wpilib/dma_edge_counting.h
+++ b/frc971/wpilib/dma_edge_counting.h
@@ -7,6 +7,7 @@
 
 #include "aos/macros.h"
 
+#include "aos/containers/sized_array.h"
 #include "frc971/wpilib/dma.h"
 
 #include "frc971/wpilib/ahal/AnalogInput.h"
@@ -239,7 +240,7 @@
   // Start().
   void Add(DMASampleHandlerInterface *handler) {
     handler->AddToDMA(dma_.get());
-    handlers_.emplace_back(handler);
+    handlers_.push_back(handler);
   }
 
   // Actually starts watching for DMA samples.
@@ -266,7 +267,7 @@
   void CheckDMA();
 
   const ::std::unique_ptr<DMA> dma_;
-  ::std::vector<DMASampleHandlerInterface *> handlers_;
+  aos::SizedArray<DMASampleHandlerInterface *, 4> handlers_;
 
   // The time at which we most recently read the sensor values.
   int64_t sample_time_ = 0;