Cleanup: take includes out of 'extern "C"' blocks

Surrounding includes with an 'extern "C"' block is not necessary anymore.
Also that made it harder to add any C++ code to some headers, or include headers
that have "optional" C++ code like `MEM_guardedalloc.h`.

I tested compilation on linux and windows (and got help from @LazyDodo).
If this still breaks compilation due to some linker error, the header containing
the symbol in question is probably missing an 'extern "C"' block.

Differential Revision: https://developer.blender.org/D7653

5 files changed, 15 insertions, 15 deletions

diff --git a/source/blender/gpu/GPU_context.h b/source/blender/gpu/GPU_context.h
index dd7611fe2fc..9876aa6998c 100644
--- a/source/blender/gpu/GPU_context.h
+++ b/source/blender/gpu/GPU_context.h
@@ -26,14 +26,14 @@
 #ifndef __GPU_CONTEXT_H__
 #define __GPU_CONTEXT_H__
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #include "GPU_batch.h"
 #include "GPU_common.h"
 #include "GPU_shader_interface.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct GPUContext GPUContext;
 
 GPUContext *GPU_context_create(GLuint default_framebuffer);
diff --git a/source/blender/gpu/GPU_draw.h b/source/blender/gpu/GPU_draw.h
index f521fa3c702..e5a6a8ffde8 100644
--- a/source/blender/gpu/GPU_draw.h
+++ b/source/blender/gpu/GPU_draw.h
@@ -24,6 +24,9 @@
 #ifndef __GPU_DRAW_H__
 #define __GPU_DRAW_H__
 
+#include "BLI_utildefines.h"
+#include "DNA_object_enums.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -34,9 +37,6 @@ struct Image;
 struct ImageUser;
 struct Main;
 
-#include "BLI_utildefines.h"
-#include "DNA_object_enums.h"
-
 /* OpenGL drawing functions related to shading. */
 
 /* Initialize
diff --git a/source/blender/gpu/GPU_init_exit.h b/source/blender/gpu/GPU_init_exit.h
index 0046eaa942b..3e30a1ddcf5 100644
--- a/source/blender/gpu/GPU_init_exit.h
+++ b/source/blender/gpu/GPU_init_exit.h
@@ -24,12 +24,12 @@
 #ifndef __GPU_INIT_EXIT_H__
 #define __GPU_INIT_EXIT_H__
 
+#include "BLI_utildefines.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "BLI_utildefines.h"
-
 void GPU_init(void);
 void GPU_exit(void);
 bool GPU_is_initialized(void);
diff --git a/source/blender/gpu/intern/gpu_batch_private.h b/source/blender/gpu/intern/gpu_batch_private.h
index 42cfc1e2a5c..58d1810ac7a 100644
--- a/source/blender/gpu/intern/gpu_batch_private.h
+++ b/source/blender/gpu/intern/gpu_batch_private.h
@@ -27,14 +27,14 @@
 #ifndef __GPU_BATCH_PRIVATE_H__
 #define __GPU_BATCH_PRIVATE_H__
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #include "GPU_batch.h"
 #include "GPU_context.h"
 #include "GPU_shader_interface.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void gpu_batch_remove_interface_ref(GPUBatch *batch, const GPUShaderInterface *interface);
 
 #ifdef __cplusplus
diff --git a/source/blender/gpu/intern/gpu_context_private.h b/source/blender/gpu/intern/gpu_context_private.h
index c9379e5433f..f64cdf439a1 100644
--- a/source/blender/gpu/intern/gpu_context_private.h
+++ b/source/blender/gpu/intern/gpu_context_private.h
@@ -26,12 +26,12 @@
 #ifndef __GPU_CONTEXT_PRIVATE_H__
 #define __GPU_CONTEXT_PRIVATE_H__
 
+#include "GPU_context.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "GPU_context.h"
-
 struct GPUFrameBuffer;
 
 GLuint GPU_vao_default(void);