Add POSIX port utilities for FreeRTOS simulation

Co-Authored-By: daniele@wolfssl.com <daniele@wolfssl.com>

Author: devin-ai-integration[bot]

fullstack/freertos-wolfip-wolfssl-https/CMakeLists.txt

@@ -26,6 +26,7 @@ set(FREERTOS_SOURCES
     ${CMAKE_CURRENT_SOURCE_DIR}/freertos/FreeRTOS-Kernel/stream_buffer.c
     ${FREERTOS_PORT_DIR}/port.c
     ${FREERTOS_HEAP_DIR}/heap_3.c
+    ${CMAKE_CURRENT_SOURCE_DIR}/freertos/utils/utils.c
 )
 
 # Add the main application

fullstack/freertos-wolfip-wolfssl-https/freertos/utils/utils.c

@@ -0,0 +1,50 @@
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+typedef struct event_t {
+    pthread_mutex_t mutex;
+    pthread_cond_t cond;
+    int value;
+} event_t;
+
+event_t *event_create(void) {
+    event_t *event = malloc(sizeof(event_t));
+    if (event != NULL) {
+        pthread_mutex_init(&event->mutex, NULL);
+        pthread_cond_init(&event->cond, NULL);
+        event->value = 0;
+    }
+    return event;
+}
+
+void event_delete(event_t *event) {
+    if (event != NULL) {
+        pthread_mutex_destroy(&event->mutex);
+        pthread_cond_destroy(&event->cond);
+        free(event);
+    }
+}
+
+void event_signal(event_t *event) {
+    if (event != NULL) {
+        pthread_mutex_lock(&event->mutex);
+        event->value = 1;
+        pthread_cond_signal(&event->cond);
+        pthread_mutex_unlock(&event->mutex);
+    }
+}
+
+void event_wait(event_t *event) {
+    if (event != NULL) {
+        pthread_mutex_lock(&event->mutex);
+        while (event->value == 0) {
+            pthread_cond_wait(&event->cond, &event->mutex);
+        }
+        event->value = 0;
+        pthread_mutex_unlock(&event->mutex);
+    }
+}