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Do not include headers inside __BEGIN_DECLS ... __END_DECLS blocks.

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We don't have C++ unsafe headers (anymore).

I added a test to fix_headers.sh that checks if certain "unsafe"
headers are ONLY included inside a __BEGIN_DECLS ... __END_DECLS
(because after all, they are unsafe), as well as checking that
no other header files are included inside such a block. The rationale
of the latter is that if a file is a C header and it declares
function prototypes (otherwise it doesn't matter) and is sometimes
included outside a __BEGIN_DECLS ... __END_DECLS block (from a C++
source file) then it has to be C++ safe and doesn't ever to be
included from inside such a block; while if a file is a C++ header
then obviously it should never be included from such a block.

fix_headers.sh subsequently found several safe headers to be
included from inside such a block, and those that were (apparently
in the past) unsafe were included only sometimes inside such a
block and often outside it. I had a look at those files and saw
that at least an attempt has been made to make them C++ safe,
but especially because they already are included OFTEN outside
a __BEGIN_DECLS ... __END_DECLS (from C++ source files) the
best decision seems to treat them as safe.

This is not risky: .c files that define such functions still
generate C-linkage for their functions. If a C++ unsafe C header
is included outside a __BEGIN_DECLS ... __END_DECLS block then
the only possible result would be an undefined reference to
a function with C++-linkage that will not exist. Aka, when
something links after this commit, then the commit was correct.
I did build all targets and they all linked.
This commit is contained in:
Carlo Wood
2016-10-28 11:57:08 +02:00
committed by Lorenz Meier
parent baf89f4398
commit 90f3e3b5d3
17 changed files with 34 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/drivers/boards/aerocore/board_config.h
+2 -3
View File
@@ -47,9 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -189,6 +186,8 @@ __BEGIN_DECLS
{GPIO_GPIO10_INPUT, GPIO_GPIO10_OUTPUT, 0}, \
{GPIO_GPIO11_INPUT, GPIO_GPIO11_OUTPUT, 0}, }
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
src/drivers/boards/asc-v1/board_config.h
+4 -3
View File
@@ -50,9 +50,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -259,6 +256,9 @@ __BEGIN_DECLS
#define TEMP_CONTROL(_on_true) px4_arch_gpiowrite(GPIO_TEMP_CONT, (_on_true))
#define FLASH_BASED_PARAMS
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
@@ -351,4 +351,5 @@ bool board_pwr_button_down(void);
void board_pwr(bool on_not_off);
#endif /* __ASSEMBLY__ */
__END_DECLS
src/drivers/boards/crazyflie/board_config.h
+1 -9
View File
@@ -47,9 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -168,8 +165,7 @@ __BEGIN_DECLS
#define BOARD_FMU_GPIO_TAB { {0, 0, 0}, }
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
@@ -219,9 +215,6 @@ extern void board_peripheral_reset(int ms);
int nsh_archinitialize(void);
#endif
/****************************************************************************
* Name: board_i2c_initialize
*
@@ -232,7 +225,6 @@ int nsh_archinitialize(void);
int board_i2c_initialize(void);
#endif /* __ASSEMBLY__ */
__END_DECLS
src/drivers/boards/mindpx-v2/board_config.h
+2 -3
View File
@@ -47,9 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -328,6 +325,8 @@ __BEGIN_DECLS
#define BOARD_DMA_ALLOC_POOL_SIZE 5120
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
src/drivers/boards/px4-stm32f4discovery/board_config.h
+2 -3
View File
@@ -47,9 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -89,6 +86,8 @@ __BEGIN_DECLS
#define BOARD_NAME "PX4_STM32F4DISCOVERY"
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
src/drivers/boards/px4fmu-v1/board_config.h
+2 -3
View File
@@ -47,9 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -224,6 +221,8 @@ __BEGIN_DECLS
*/
#define BOARD_HAS_MULTI_PURPOSE_GPIO 1
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
src/drivers/boards/px4fmu-v2/board_config.h
+3 -4
View File
@@ -47,9 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -271,8 +268,10 @@ __BEGIN_DECLS
{GPIO_VDD_5V_PERIPH_OC, 0, 0}, }
/* This board provides a DMA pool and APIs */
#define BOARD_DMA_ALLOC_POOL_SIZE 5120
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
src/drivers/boards/px4fmu-v4/board_config.h
+2 -4
View File
@@ -47,9 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -298,9 +295,10 @@ __BEGIN_DECLS
{GPIO_VDD_BRICK_VALID, 0, 0}, }
/* This board provides a DMA pool and APIs */
#define BOARD_DMA_ALLOC_POOL_SIZE 5120
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
src/drivers/boards/px4io-v1/board_config.h
-1
View File
@@ -47,7 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
src/drivers/boards/px4io-v2/board_config.h
-2
View File
@@ -47,7 +47,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -143,4 +142,3 @@
#define LED_SIGNAL 5 /* LED? + LED? */
#define LED_ASSERTION 6 /* LED? + LED? + LED? */
#define LED_PANIC 7 /* N/C + N/C + N/C + LED? */
src/drivers/boards/tap-v1/board_config.h
+4 -4
View File
@@ -48,9 +48,6 @@
#include <nuttx/compiler.h>
#include <stdint.h>
__BEGIN_DECLS
/* these headers are not C++ safe */
#include <stm32.h>
#include <arch/board/board.h>
@@ -262,6 +259,9 @@ __BEGIN_DECLS
#define TEMP_CONTROL(_on_true) px4_arch_gpiowrite(GPIO_TEMP_CONT, (_on_true))
#define FLASH_BASED_PARAMS
__BEGIN_DECLS
/****************************************************************************************************
* Public Types
****************************************************************************************************/
@@ -320,7 +320,6 @@ extern int board_sdio_initialize(void);
int nsh_archinitialize(void);
#endif
/************************************************************************************
* Name: board_pwr_init()
*
@@ -364,4 +363,5 @@ void board_pwr(bool on_not_off);
int board_i2c_initialize(void);
#endif /* __ASSEMBLY__ */
__END_DECLS
src/drivers/drv_pwm_output.h
+3 -1
View File
@@ -44,6 +44,9 @@
#pragma once
#include <px4_defines.h>
#include "uORB/topics/output_pwm.h"
#include <stdint.h>
#include <sys/ioctl.h>
@@ -61,7 +64,6 @@ __BEGIN_DECLS
#define PWM_OUTPUT_BASE_DEVICE_PATH "/dev/pwm_output"
#define PWM_OUTPUT0_DEVICE_PATH "/dev/pwm_output0"
#include <uORB/topics/output_pwm.h>
#define pwm_output_values output_pwm_s
#ifndef PWM_OUTPUT_MAX_CHANNELS