sergiotarxz/nuttx-apps
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

add shm example using fs shm

Browse Source
This commit is contained in:
ThomasNS 2023-10-04 17:08:25 +02:00 committed by Xiang Xiao
parent b88057fffd
commit 06b4911db4
5 changed files with 242 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
examples/shm_test/CMakeLists.txt Normal file
View File

@ -0,0 +1,31 @@
# ##############################################################################
# apps/examples/shm_test/CMakeLists.txt
#
# Licensed to the Apache Software Foundation (ASF) under one or more contributor
# license agreements. See the NOTICE file distributed with this work for
# additional information regarding copyright ownership. The ASF licenses this
# file to you under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
#
# ##############################################################################
if(CONFIG_EXAMPLES_SHM)
nuttx_add_application(
NAME
${CONFIG_EXAMPLES_SHM_PROGNAME}
SRCS
shm_main.c
STACKSIZE
${CONFIG_EXAMPLES_SHM_STACKSIZE}
PRIORITY
${CONFIG_EXAMPLES_SHM_PRIORITY})
endif()

30
examples/shm_test/Kconfig Normal file
View File

@ -0,0 +1,30 @@
#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config EXAMPLES_SHM
tristate "SHM example"
default n
depends on FS_SHMFS
---help---
Enable the SHM example which has an shm producer and consumer
if EXAMPLES_SHM
config EXAMPLES_SHM_PROGNAME
string "Program name"
default "shm_test"
---help---
This is the name of the program that will be used when the NSH ELF
program is installed.
config EXAMPLES_SHM_PRIORITY
int "SHM task priority"
default 100
config EXAMPLES_SHM_STACKSIZE
int "SHM stack size"
default DEFAULT_TASK_STACKSIZE
endif

23
examples/shm_test/Make.defs Normal file
View File

@ -0,0 +1,23 @@
############################################################################
# apps/examples/shm_test/Make.defs
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
ifneq ($(CONFIG_EXAMPLES_SHM),)
CONFIGURED_APPS += $(APPDIR)/examples/shm_test
endif

42
examples/shm_test/Makefile Normal file
View File

@ -0,0 +1,42 @@
############################################################################
# apps/examples/shm_test/Makefile
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
include $(APPDIR)/Make.defs
# SHM test built-in application info
PROGNAME = $(CONFIG_EXAMPLES_SHM_PROGNAME)
PRIORITY = $(CONFIG_EXAMPLES_SHM_PRIORITY)
STACKSIZE = $(CONFIG_EXAMPLES_SHM_STACKSIZE)
MODULE = $(CONFIG_EXAMPLES_SHM)
# SHM test Example
MAINSRC = shm_main.c
# Build with WebAssembly when CONFIG_INTERPRETERS_WAMR is enabled
WASM_BUILD = both
# Mode of WebAssembly Micro Runtime
WAMR_MODE = AOT
include $(APPDIR)/Application.mk

116
examples/shm_test/shm_main.c Normal file
View File

@ -0,0 +1,116 @@
/****************************************************************************
* apps/examples/shm_test/shm_main.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <fcntl.h>
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <unistd.h>
/****************************************************************************
* Public Functions
****************************************************************************/
void shm_producer(const int shm_size, const char *shm_name)
{
/* Write Hello World! to shared memory */
const char *message_0 = "Hello";
const char *message_1 = "World!";
/* Shared memory file descriptor */
int shm_fd;
/* Pointer to shared memory object */
void *ptr;
/* Create the shared memory object */
shm_fd = shm_open(shm_name, O_CREAT | O_RDWR, 0666);
/* Configure the size of the shared memory object */
ftruncate(shm_fd, shm_size);
/* Memory map the shared memory object */
ptr = mmap(0, shm_size, PROT_WRITE, MAP_SHARED, shm_fd, 0);
/* Write to the shared memory object */
sprintf(ptr, "%s", message_0);
ptr += strlen(message_0);
sprintf(ptr, "%s", message_1);
ptr += strlen(message_1);
printf("Producer Wrote to SHM: %s%s\n", message_0, message_1);
}
void shm_consumer(const int shm_size, const char *shm_name)
{
/* Shared memory file descriptor */
int shm_fd;
/* Pointer to shared memory object */
void *ptr;
/* Open the shared memory object */
shm_fd = shm_open(shm_name, O_RDONLY, 0666);
/* Memory map the shared memory object */
ptr = mmap(0, shm_size, PROT_READ, MAP_SHARED, shm_fd, 0);
/* Read from the shared memory object */
printf("Consumer Read from SHM: %s\n", (char *)ptr);
/* Remove the shared memory object */
shm_unlink(shm_name);
}
/****************************************************************************
* shm_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
const int shm_size = 2048;
const char *shm_name = "OS";
shm_producer(shm_size, shm_name);
shm_consumer(shm_size, shm_name);
return 0;
}