ESP32: add support for "Misc Paltform Entries"

This will allow to store miscellaneous information inside ESP32PlatformData sturct, so we don't need to add new fields or lists to it every time we add support for a new NIF. This change has been introduced to support tracking of mounted filesystem in order to allow umounting them using `esp:umount/1`. Signed-off-by: Davide Bettio <[email protected]>
atomvm · Sep 29, 2024 · 905adb7 · 905adb7
1 parent 4b37211
commit 905adb7
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diff --git a/src/platforms/esp32/components/avm_sys/include/esp32_sys.h b/src/platforms/esp32/components/avm_sys/include/esp32_sys.h
@@ -89,6 +89,16 @@ struct EventListener
     listener_event_t sender;
 };
 
+struct MiscEntry
+{
+    struct ListHead list_head;
+
+    // entry_type must be unique for a certain type of entry.
+    // I suggest using a function pointer to the "constructor function" as a unique value since
+    // since 2 different functions have always different addressed.
+    uintptr_t entry_type;
+};
+
 struct ESP32PlatformData
 {
     pthread_t select_thread;
@@ -114,6 +124,8 @@ struct ESP32PlatformData
 #endif
     mbedtls_ctr_drbg_context random_ctx;
     bool random_is_initialized;
+
+    struct SyncList misc_entries;
 };
 
 typedef void (*port_driver_init_t)(GlobalContext *global);

diff --git a/src/platforms/esp32/components/avm_sys/sys.c b/src/platforms/esp32/components/avm_sys/sys.c
@@ -264,6 +264,8 @@ void sys_init_platform(GlobalContext *glb)
 
     platform->entropy_is_initialized = false;
     platform->random_is_initialized = false;
+
+    synclist_init(&platform->misc_entries);
 }
 
 void sys_free_platform(GlobalContext *glb)