Re-Commit: Fix: correct install script and readme for continuation style.

CMakeLists.txt

@@ -35,6 +35,14 @@ add_subdirectory(extern/benchmark_runner)
 add_subdirectory(lib/context_switcher)
 add_subdirectory(lib/pls)
 
+# ...add a custom target that will only build the library when installing.
+# This can allow us to speed up the installation on embedded devices.
+ADD_CUSTOM_TARGET(install.pls
+        ${CMAKE_COMMAND}
+        -DBUILD_TYPE=${CMAKE_BUILD_TYPE}
+        -P ${CMAKE_BINARY_DIR}/cmake_install.cmake)
+ADD_DEPENDENCIES(install.pls context_switcher pls)
+
 # Include examples
 add_subdirectory(app/playground)
 add_subdirectory(app/benchmark_fft)

README.md

@@ -9,16 +9,16 @@
 
 This section will give a brief introduction on how to get a minimal
 project setup that uses the PLS library.
-Further [general notes](NOTES.md) and [performance notes](PERFORMANCE.md) can be found in
+Further [general notes](NOTES.md) and [performance notes](PERFORMANCE-v2.md) can be found in
 their respective files.
 
-Further notes on [performance](PERFORMANCE.md) and general
-[notes](NOTES.md) on the development progress can be found in
-the linked documents.
-
-
 ### Installation
 
+PLS has no external dependencies. To compile and install it you
+only need cmake and a recent C++ 17 compatible compiler.
+Care might be required on not explicitly supported systems
+(currently we support Linux x86 and ARMv7).
+
 Clone the repository and open a terminal session in its folder.
 Create a build folder using `mkdir cmake-build-release`
 and switch into it `cd cmake-build-release`.
@@ -36,16 +36,17 @@ using `target_link_libraries(your_target pls::pls)`.
 #include <pls/pls.h>
 #include <iostream>
 
+// Static memory allocation (see execution trees for how to configure)
+static const int MAX_NUM_TASKS = 32;
+static const int MAX_STACK_SIZE = 4096;
+static const int NUM_THREADS = 8;
+
 long fib(long n);
 
 int main() {
-    // All memory needed by the scheduler can be allocated in advance either on stack or using malloc.
-    const unsigned int num_threads = 8;
-    const unsigned int memory_per_thread = 2 << 14;
-    static pls::static_scheduler_memory<num_threads, memory_per_thread> memory;
-
-    // Create the scheduler instance (starts a thread pool).
-    pls::scheduler scheduler{&memory, num_threads};
+  // Create a scheduler with the static amount of resources.
+  // All memory and system resources are allocated here.
+  pls::scheduler scheduler{NUM_THREADS, MAX_NUM_TASKS, MAX_STACK_SIZE};
 
   // Wake up the thread pool and perform work.
   scheduler.perform_work([&] {
@@ -54,36 +55,38 @@ int main() {
   });
   // At this point the thread pool sleeps.
   // This can for example be used for periodic work.
+
+  // The scheduler is destroyed at the end of the scope
 }
 
 long fib(long n) {
-    if (n == 0) {
-        return 0;
-    }
-    if (n == 1) {
-        return 1;
+  if (n <= 1) {
+    return n;
   }
 
   // Example for the high level API.
-    // Will run both functions in parallel as seperate tasks.
-    int left, right;
-    pls::invoke_parallel(
-            [&] { left = fib(n - 1); },
-            [&] { right = fib(n - 2); }
+  // Will run both functions in parallel as separate tasks.
+  int a, b;
+  pls::invoke(
+      [&a, n] { a = fib(n - 1); },
+      [&b, n] { b = fib(n - 2); }
   );
-    return left + right;
+  return a + b;
 }
-
 ```
 
+### Execution Trees and Static Resource Allocation
+
+TODO: For the static memory allocation you need to find the maximum required resources.
+
 ## Project Structure
 
 The project uses [CMAKE](https://cmake.org/) as it's build system,
 the recommended IDE is either a simple text editor or [CLion](https://www.jetbrains.com/clion/).
 We divide the project into sub-targets to separate for the library
 itself, testing and example code. The library itself can be found in
-`lib/pls`, testing related code is in `test`, example and playground
-apps are in `app`.
+`lib/pls`, the context switching implementation in `lib/context_switcher`,
+testing related code is in `test`, example and playground/benchmark apps are in `app`.
 
 ### Buiding
 

app/context_switch/deboost.context/CMakeLists.txt

@@ -74,6 +74,3 @@ target_include_directories(fcontext
 set_property(TARGET fcontext PROPERTY INTERPROCEDURAL_OPTIMIZATION FALSE)
 set_target_properties(fcontext PROPERTIES FOLDER Deps ${IOS_GENERAL_PROPERTIES})
 
-install(TARGETS fcontext DESTINATION lib)
-install(FILES ${HEADER} DESTINATION include/fcontext)
-

app/playground/main.cpp

+#include <pls/pls.h>
+#include <iostream>
+
+// Static memory allocation (see execution trees for how to configure)
+static const int MAX_NUM_TASKS = 32;
+static const int MAX_STACK_SIZE = 4096;
+static const int NUM_THREADS = 8;
+
+long fib(long n);
+
 int main() {
+  // Create a scheduler with the static amount of resources.
+  // All memory and system resources are allocated here.
+  pls::scheduler scheduler{NUM_THREADS, MAX_NUM_TASKS, MAX_STACK_SIZE};
+
+  // Wake up the thread pool and perform work.
+  scheduler.perform_work([&] {
+    long result = fib(20);
+    std::cout << "fib(20)=" << result << std::endl;
+  });
+  // At this point the thread pool sleeps.
+  // This can for example be used for periodic work.
+
+  // The scheduler is destroyed at the end of the scope
+}
+
+long fib(long n) {
+  if (n <= 1) {
+    return n;
+  }
 
-  return 0;
+  // Example for the high level API.
+  // Will run both functions in parallel as separate tasks.
+  int a, b;
+  pls::invoke(
+      [&a, n] { a = fib(n - 1); },
+      [&b, n] { b = fib(n - 2); }
+  );
+  return a + b;
 }

lib/context_switcher/CMakeLists.txt

@@ -64,19 +64,31 @@ target_include_directories(context_switcher
         $<INSTALL_INTERFACE:include>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
         PRIVATE
-        ${CMAKE_CURRENT_SOURCE_DIR}/src
+        ${CMAKE_CURRENT_SOURCE_DIR}/src # TODO: Set this up when we require private headers
         )
 
-# Installation on the system (we pack the context switcher with pls for now...)
+# Rules for installing the library on a system
+# ...binaries
 INSTALL(TARGETS context_switcher
-        EXPORT pls-targets
+        EXPORT context_switcher-targets
         LIBRARY DESTINATION lib/context_switcher
         ARCHIVE DESTINATION lib/context_switcher
         )
 # ...all headers in `include`
 INSTALL(
-        DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/pls
+        DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/include/context_switcher
         DESTINATION include
         FILES_MATCHING PATTERN "*.h*"
 )
+# ...allow our project to be a cmake dependency
+install(
+        EXPORT context_switcher-targets
+        FILE context_switcherTargets.cmake
+        NAMESPACE context_switcher::
+        DESTINATION lib/context_switcher
+)
+INSTALl(
+        FILES context_switcher-config.cmake
+        DESTINATION lib/context_switcher
+)
 

lib/context_switcher/context_switcher-config.cmake

 get_filename_component(SELF_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
-include(${SELF_DIR}/plsTargets.cmake)
+include(${SELF_DIR}/context_switcherTargets.cmake)

lib/pls/CMakeLists.txt

@@ -53,13 +53,6 @@ target_include_directories(pls
         ${CMAKE_CURRENT_SOURCE_DIR}/src # TODO: Set this up when we require private headers
         )
 
-# Enable warnings/tidy code checking from our compiler
-target_compile_options(pls PRIVATE
-        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:
-        -Wall>
-        $<$<CXX_COMPILER_ID:MSVC>:
-        -W4>)
-
 # Rules for installing the library on a system
 # ...binaries
 INSTALL(TARGETS pls
@@ -84,10 +77,3 @@ INSTALl(
         FILES pls-config.cmake
         DESTINATION lib/pls
 )
-# ...add a custom target that will only build the library when installing.
-# This can allow us to speed up the installation on embedded devices.
-ADD_CUSTOM_TARGET(install.pls
-        ${CMAKE_COMMAND}
-        -DBUILD_TYPE=${CMAKE_BUILD_TYPE}
-        -P ${CMAKE_BINARY_DIR}/cmake_install.cmake)
-ADD_DEPENDENCIES(install.pls context_switcher pls)

lib/pls/pls-config.cmake

+find_package(context_switcher REQUIRED)
+
 get_filename_component(SELF_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
 include(${SELF_DIR}/plsTargets.cmake)