Example ipc (#60)

* add blank example

* add ipc example code, need to change FURI API

* add ipc example code, need to change FURI API

* change core API, add context

* check handler at take

* fix important bugs in furi

* drawing example

* add posix mq

* fix unsigned demo counter

* create at open

* working local demo

* russian version of IPC example

* english version

* add gif

target_lo/Inc/cmsis_os.h

@@ -1,3 +1,5 @@
+#pragma once
+
 #include "main.h"
 #include <stdbool.h>
 
@@ -5,12 +7,33 @@ void osDelay(uint32_t ms);
 
 // some FreeRTOS types
 typedef void(*TaskFunction_t)(void*);
-typedef uint32_t UBaseType_t;
+typedef size_t UBaseType_t;
 typedef uint32_t StackType_t;
 typedef uint32_t StaticTask_t;
 typedef pthread_t* TaskHandle_t;
-typedef uint32_t StaticSemaphore_t;
-typedef void* SemaphoreHandle_t;
+
+
+typedef enum {
+    SemaphoreTypeCounting
+} SemaphoreType;
+typedef struct {
+    SemaphoreType type;
+    uint8_t take_counter;
+    uint8_t give_counter;
+} StaticSemaphore_t;
+typedef StaticSemaphore_t* SemaphoreHandle_t;
+
+typedef uint32_t StaticQueue_t;
+typedef StaticQueue_t* QueueHandle_t;
+
+#define portMAX_DELAY -1
+
+typedef enum {
+    pdTRUE = 1,
+    pdFALSE = 0
+} BaseType_t;
+
+typedef int32_t TickType_t;
 
 #define tskIDLE_PRIORITY 0
 
@@ -28,3 +51,24 @@ void vTaskDelete(TaskHandle_t xTask);
 TaskHandle_t xTaskGetCurrentTaskHandle(void);
 SemaphoreHandle_t xSemaphoreCreateMutexStatic(StaticSemaphore_t* pxMutexBuffer);
 bool task_equal(TaskHandle_t a, TaskHandle_t b);
+
+QueueHandle_t xQueueCreateStatic(
+    UBaseType_t uxQueueLength,
+    UBaseType_t uxItemSize,
+    uint8_t* pucQueueStorageBuffer,
+    StaticQueue_t* pxQueueBuffer
+);
+
+SemaphoreHandle_t xSemaphoreCreateCountingStatic(
+    UBaseType_t uxMaxCount,
+    UBaseType_t uxInitialCount,
+    StaticSemaphore_t *pxSemaphoreBuffer
+);
+BaseType_t xSemaphoreTake(SemaphoreHandle_t xSemaphore, TickType_t xTicksToWait);
+BaseType_t xSemaphoreGive(SemaphoreHandle_t xSemaphore);
+
+BaseType_t xQueueSend(
+    QueueHandle_t xQueue, const void * pvItemToQueue, TickType_t xTicksToWait
+);
+
+BaseType_t xQueueReceive(QueueHandle_t xQueue, void *pvBuffer, TickType_t xTicksToWait);

target_lo/Makefile

@@ -31,7 +31,7 @@ C_SOURCES += Src/flipper_hal.c
 C_SOURCES += Src/lo_os.c
 C_SOURCES += Src/lo_hal.c
 
-C_DEFS += -DFURI_DEBUG
+# C_DEFS += -DFURI_DEBUG
 
 # Core
 
@@ -63,6 +63,11 @@ C_SOURCES += ../applications/examples/uart_write.c
 C_DEFS += -DEXAMPLE_UART_WRITE
 endif
 
+ifeq ($(EXAMPLE_IPC), 1)
+C_SOURCES += ../applications/examples/ipc.c
+C_DEFS += -DEXAMPLE_IPC
+endif
+
 # User application
 
 # Add C_SOURCES +=, C_DEFS += or CPP_SOURCES += here
@@ -139,19 +144,24 @@ rust_lib:
 	$(RUST_LIB_CMD)
 
 example_blink:
+	rm -f $(BUILD_DIR)/app.o
 	EXAMPLE_BLINK=1 make
-	rm $(BUILD_DIR)/app.o
 	$(BUILD_DIR)/$(TARGET)
 
 
 example_uart_write:
+	rm -f $(BUILD_DIR)/app.o
 	EXAMPLE_UART_WRITE=1 make
-	rm $(BUILD_DIR)/app.o
+	$(BUILD_DIR)/$(TARGET)
+
+example_ipc:
+	rm -f $(BUILD_DIR)/app.o
+	EXAMPLE_IPC=1 make
 	$(BUILD_DIR)/$(TARGET)
 
 test:
+	rm -f $(BUILD_DIR)/app.o
 	TEST=1 make
-	rm $(BUILD_DIR)/app.o
 	$(BUILD_DIR)/$(TARGET)
 
 .PHONY: all rust_lib example_blink example_uart_write test

target_lo/Src/lo_os.c

@@ -4,6 +4,9 @@
 #include <pthread.h>
 #include <errno.h>
 #include <signal.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/msg.h>
 
 void osDelay(uint32_t ms) {
     // printf("[DELAY] %d ms\n", ms);
@@ -82,4 +85,79 @@ bool task_equal(TaskHandle_t a, TaskHandle_t b) {
 SemaphoreHandle_t xSemaphoreCreateMutexStatic(StaticSemaphore_t* pxMutexBuffer) {
     // TODO add posix mutex init
     return NULL;
+}
+
+BaseType_t xQueueSend(
+    QueueHandle_t xQueue, const void * pvItemToQueue, TickType_t xTicksToWait
+) {
+    // TODO: add implementation
+    return pdTRUE;
+}
+
+BaseType_t xQueueReceive(
+    QueueHandle_t xQueue, void *pvBuffer, TickType_t xTicksToWait
+) {
+    // TODO: add implementation
+    osDelay(100);
+
+    return pdFALSE;
+}
+
+static uint32_t queue_global_id = 0;
+
+QueueHandle_t xQueueCreateStatic(
+    UBaseType_t uxQueueLength,
+    UBaseType_t uxItemSize,
+    uint8_t* pucQueueStorageBuffer,
+    StaticQueue_t *pxQueueBuffer
+) {
+    // TODO: check this implementation
+    int* msgid = malloc(sizeof(int));
+
+    key_t key = queue_global_id;
+    queue_global_id++;
+
+    *msgid = msgget(key, IPC_CREAT);
+
+    return (QueueHandle_t)msgid;
+}
+
+SemaphoreHandle_t xSemaphoreCreateCountingStatic(
+    UBaseType_t uxMaxCount,
+    UBaseType_t uxInitialCount,
+    StaticSemaphore_t* pxSemaphoreBuffer
+) {
+    pxSemaphoreBuffer->take_counter = 0;
+    pxSemaphoreBuffer->give_counter = 0;
+    return pxSemaphoreBuffer;
+}
+
+BaseType_t xSemaphoreTake(SemaphoreHandle_t xSemaphore, TickType_t xTicksToWait) {
+    if(xSemaphore == NULL) return false;
+    
+    // TODO: need to add inter-process sync or use POSIX primitives
+    xSemaphore->take_counter++;
+
+    TickType_t ticks = xTicksToWait;
+
+    while(
+        xSemaphore->take_counter != xSemaphore->give_counter
+        && (ticks > 0 || xTicksToWait == portMAX_DELAY)
+    ) {
+        osDelay(1);
+        ticks--;
+    }
+
+    if(xTicksToWait != 0 && ticks == 0) return pdFALSE;
+
+    return pdTRUE;
+}
+
+BaseType_t xSemaphoreGive(SemaphoreHandle_t xSemaphore) {
+    if(xSemaphore == NULL) return false;
+
+    // TODO: need to add inter-process sync or use POSIX primitives
+    xSemaphore->give_counter++;
+
+    return pdTRUE;
 }