fix(examples): simple http_server example build for Linux target

Static task creation on Linux target had issues with insufficient stack
memory allocation. Type of `StackType_t` is `unsigned long` and hence
it must be considered during stack memory allocation.

Fix ensures proper working of simple HTTP server example.

components/esp_http_server/CMakeLists.txt

@@ -1,13 +1,6 @@
-set(priv_req mbedtls)
+set(priv_req mbedtls lwip esp_timer)
-set(priv_inc_dir "src/util")
+set(priv_inc_dir "src/util" "src/port/esp32")
 set(requires http_parser esp_event)
-if(NOT ${IDF_TARGET} STREQUAL "linux")
-    list(APPEND priv_req lwip esp_timer)
-    list(APPEND priv_inc_dir "src/port/esp32")
-else()
-    list(APPEND priv_inc_dir "src/port/linux")
-    list(APPEND priv_req pthread)
-endif()
 
 idf_component_register(SRCS "src/httpd_main.c"
                             "src/httpd_parse.c"

components/esp_http_server/src/port/linux/osal.h

@@ -1,55 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-#pragma once
-
-#include <unistd.h>
-#include <stdint.h>
-#include <pthread.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define OS_SUCCESS ESP_OK
-#define OS_FAIL    ESP_FAIL
-
-typedef TaskHandle_t othread_t;
-
-static inline int httpd_os_thread_create(othread_t *thread,
-                                 const char *name, uint16_t stacksize, int prio,
-                                 void (*thread_routine)(void *arg), void *arg,
-                                 BaseType_t core_id, uint32_t caps)
-{
-    pthread_attr_t thread_attr;
-    pthread_attr_init(&thread_attr);
-    pthread_attr_setstacksize(&thread_attr, stacksize);
-    int ret = pthread_create((pthread_t *)thread, &thread_attr, (void*)thread_routine, arg);
-    if (ret == 0) {
-        return OS_SUCCESS;
-    }
-    return OS_FAIL;
-}
-
-/* Only self delete is supported */
-static inline void httpd_os_thread_delete(void)
-{
-    int x;
-    pthread_exit((void *)&x);
-}
-
-static inline void httpd_os_thread_sleep(int msecs)
-{
-    usleep(msecs * 1000);
-}
-
-static inline othread_t httpd_os_thread_handle(void)
-{
-    return (othread_t)pthread_self();
-}
-
-#ifdef __cplusplus
-}
-#endif

components/freertos/esp_additions/idf_additions.c

@@ -47,7 +47,7 @@
 
         /* Allocate memory for the task's stack using the provided memory caps
          * */
-        pxStack = heap_caps_malloc( usStackDepth, ( uint32_t ) uxMemoryCaps );
+        pxStack = heap_caps_malloc( ( ( size_t ) usStackDepth ) * sizeof( StackType_t ), ( uint32_t ) uxMemoryCaps );
 
         if( ( pxTaskBuffer == NULL ) || ( pxStack == NULL ) )
         {

examples/protocols/.build-test-rules.yml

@@ -73,6 +73,16 @@ examples/protocols/http_server/restful_server:
   depends_filepatterns:
     - components/esp_http_server/**/*
 
+examples/protocols/http_server/simple:
+  <<: *default_dependencies
+  enable:
+    - if: INCLUDE_DEFAULT == 1 or IDF_TARGET == "linux"
+  disable_test:
+    - if: IDF_TARGET not in ["esp32", "esp32c3", "esp32s3"]
+      reason: only test on these targets
+  depends_filepatterns:
+    - components/esp_http_server/**/*
+
 examples/protocols/http_server/ws_echo_server:
   <<: *default_dependencies
   disable_test:

examples/protocols/http_server/simple/README.md

@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 | Linux |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | -------- | -------- |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | -------- | -------- | ----- |
 
 # Simple HTTPD Server Example
 

examples/protocols/http_server/simple/main/CMakeLists.txt

@@ -1,9 +1,12 @@
-set(requires esp-tls nvs_flash esp_netif esp_http_server esp_wifi esp_eth)
+set(requires esp-tls nvs_flash esp_netif esp_http_server)
 idf_build_get_property(target IDF_TARGET)
 
 if(${target} STREQUAL "linux")
     list(APPEND requires esp_stubs protocol_examples_common)
+else()
+    list(APPEND requires esp_wifi esp_eth)
 endif()
+
 idf_component_register(SRCS "main.c"
                     INCLUDE_DIRS "."
                     PRIV_REQUIRES ${requires})

examples/protocols/http_server/simple/main/main.c

@@ -407,7 +407,7 @@ static esp_err_t sse_handler(httpd_req_t *req)
         gettimeofday(&tv, NULL); // Get the current time
         int64_t time_since_boot = tv.tv_sec; // Time since boot in seconds
         esp_err_t err;
-        int len = snprintf(sse_data, sizeof(sse_data), "data: Time since boot: %lld seconds\n\n", time_since_boot);
+        int len = snprintf(sse_data, sizeof(sse_data), "data: Time since boot: %" PRIi64 " seconds\n\n", time_since_boot);
         if ((err = httpd_resp_send_chunk(req, sse_data, len)) != ESP_OK) {
             ESP_LOGE(TAG, "Failed to send sse data (returned %02X)", err);
             break;