1 files changed, 432 insertions, 0 deletions

diff --git a/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/shared/platform/riot/riot_thread.c b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/shared/platform/riot/riot_thread.c
new file mode 100644
index 000000000..0ebcf30e0
--- /dev/null
+++ b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/shared/platform/riot/riot_thread.c
@@ -0,0 +1,432 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * Copyright (C) 2020 TU Bergakademie Freiberg Karl Fessel
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include "platform_api_vmcore.h"
+#include "platform_api_extension.h"
+
+#include <panic.h>
+#include <sema.h>
+#include <ztimer.h>
+
+/* clang-format off */
+#define bh_assert(v) do {                                   \
+     if (!(v)) {                                            \
+       printf("\nASSERTION FAILED: %s, at %s, line %d\n",   \
+              #v, __FILE__, __LINE__);                      \
+       core_panic(0, 0/*expr_string*/);                     \
+       while (1);                                           \
+     }                                                      \
+} while (0)
+/* clang-format on */
+
+struct os_thread_data;
+typedef struct os_thread_wait_node {
+    sema_t sem;
+    void *ret;
+    os_thread_wait_list next;
+} os_thread_wait_node;
+
+// all information for thread to cleanup it self
+typedef struct os_thread_data {
+    /* Next thread data */
+    struct os_thread_data *next;
+    /* thread handle */
+    kernel_pid_t tid;
+    /* Thread start routine */
+    thread_start_routine_t start_routine;
+    /* Thread start routine argument */
+    void *arg;
+    /* thread local root */
+    void *tlr;
+    /* Lock for waiting list */
+    mutex_t wait_list_lock;
+    /* Waiting list of other threads who are joining this thread */
+    os_thread_wait_list thread_wait_list;
+    /* Thread stack size */
+    unsigned stack_size;
+    /* Thread stack */
+    char stack[1];
+} os_thread_data;
+
+typedef struct os_thread_obj {
+    korp_tid thread;
+    /* Whether the thread is terminated and this thread object is to
+     be freed in the future. */
+    bool to_be_freed;
+    struct os_thread_obj *next;
+} os_thread_obj;
+
+static bool is_thread_sys_inited = false;
+
+/* Lock for thread data list */
+static mutex_t thread_data_lock;
+
+/* Thread data list */
+static os_thread_data *thread_data_list = NULL;
+
+static void
+thread_data_list_add(os_thread_data *thread_data)
+{
+    mutex_lock(&thread_data_lock);
+    if (!thread_data_list)
+        thread_data_list = thread_data;
+    else {
+        /* If already in list, just return */
+        os_thread_data *p = thread_data_list;
+        while (p) {
+            if (p == thread_data) {
+                mutex_unlock(&thread_data_lock);
+                return;
+            }
+            p = p->next;
+        }
+
+        /* Set as head of list */
+        thread_data->next = thread_data_list;
+        thread_data_list = thread_data;
+    }
+    mutex_unlock(&thread_data_lock);
+}
+
+static void
+thread_data_list_remove(os_thread_data *thread_data)
+{
+    mutex_lock(&thread_data_lock);
+    if (thread_data_list) {
+        if (thread_data_list == thread_data)
+            thread_data_list = thread_data_list->next;
+        else {
+            /* Search and remove it from list */
+            os_thread_data *p = thread_data_list;
+            while (p && p->next != thread_data)
+                p = p->next;
+            if (p && p->next == thread_data)
+                p->next = p->next->next;
+        }
+    }
+    mutex_unlock(&thread_data_lock);
+}
+
+static os_thread_data *
+thread_data_list_lookup(korp_tid tid)
+{
+    mutex_lock(&thread_data_lock);
+    if (thread_data_list) {
+        os_thread_data *p = thread_data_list;
+        while (p) {
+            if (p->tid == tid) {
+                /* Found */
+                mutex_unlock(&thread_data_lock);
+                return p;
+            }
+            p = p->next;
+        }
+    }
+    mutex_unlock(&thread_data_lock);
+    return NULL;
+}
+
+int
+os_thread_sys_init()
+{
+    if (is_thread_sys_inited)
+        return BHT_OK;
+
+    mutex_init(&thread_data_lock);
+
+    is_thread_sys_inited = true;
+    return BHT_OK;
+}
+
+void
+os_thread_sys_destroy()
+{
+    if (is_thread_sys_inited) {
+        is_thread_sys_inited = false;
+    }
+}
+
+static os_thread_data *
+thread_data_current()
+{
+    kernel_pid_t tid = thread_getpid();
+    return thread_data_list_lookup(tid);
+}
+
+static void
+os_thread_cleanup(void)
+{
+    // TODO Check this (Join sema trigger, cleanup of thread_data)
+    os_thread_data *thread_data = thread_data_current();
+    bh_assert(thread_data != NULL);
+    mutex_lock(&thread_data->wait_list_lock);
+    if (thread_data->thread_wait_list) {
+        /* Signal each joining thread */
+        os_thread_wait_list head = thread_data->thread_wait_list;
+        while (head) {
+            os_thread_wait_list next = head->next;
+            head->ret = thread_data->arg;
+            sema_post(&head->sem);
+            head = next;
+        }
+        thread_data->thread_wait_list = NULL;
+    }
+    mutex_unlock(&thread_data->wait_list_lock);
+
+    thread_data_list_remove(thread_data);
+}
+
+static void *
+os_thread_wrapper(void *thread_data)
+{
+    /* Set thread custom data */
+    os_thread_data *t = (os_thread_data *)thread_data;
+    t->tid = thread_getpid();
+    thread_data_list_add(t);
+
+    // save the return value to arg since it is not need after the call
+    t->arg = (t->start_routine)(t->arg);
+
+    os_thread_cleanup(); // internal structures and joiners
+
+    BH_FREE(thread_data);
+    sched_task_exit(); // stop thread //clean
+    return NULL;       // never reached
+}
+
+int
+os_thread_create(korp_tid *p_tid, thread_start_routine_t start, void *arg,
+                 unsigned int stack_size)
+{
+    return os_thread_create_with_prio(p_tid, start, arg, stack_size,
+                                      BH_THREAD_DEFAULT_PRIORITY);
+}
+
+int
+os_thread_create_with_prio(korp_tid *p_tid, thread_start_routine_t start,
+                           void *arg, unsigned int stack_size, int prio)
+{
+    kernel_pid_t tid;
+    os_thread_data *thread_data;
+    unsigned thread_data_size;
+
+    if (!p_tid || !stack_size)
+        return BHT_ERROR;
+
+    /* Create and initialize thread data */
+    thread_data_size = offsetof(os_thread_data, stack) + stack_size;
+    if (!(thread_data = BH_MALLOC(thread_data_size))) {
+        return BHT_ERROR;
+    }
+
+    memset(thread_data, 0, thread_data_size);
+    mutex_init(&thread_data->wait_list_lock);
+    thread_data->stack_size = stack_size;
+    thread_data->start_routine = start;
+    thread_data->arg = arg;
+
+    /* Create the thread &*/
+    if (!((tid = thread_create(thread_data->stack, stack_size, prio, 0,
+                               os_thread_wrapper, thread_data, "WASM")))) {
+        BH_FREE(thread_data);
+        return BHT_ERROR;
+    }
+
+    thread_data->tid = tid;
+
+    /* Set thread custom data */
+    thread_data_list_add(thread_data);
+    *p_tid = tid;
+    return BHT_OK;
+}
+
+korp_tid
+os_self_thread()
+{
+    return (korp_tid)thread_getpid();
+}
+
+int
+os_thread_join(korp_tid thread, void **value_ptr)
+{
+    // will test if thread is still working,
+    // wait if it is
+    os_thread_data *thread_data;
+    os_thread_wait_node node;
+
+    sema_create(&node.sem, 0);
+    node.next = NULL;
+
+    /* Get thread data */
+    thread_data = thread_data_list_lookup(thread);
+    if (thread_data == NULL) {
+        // thread not found
+        sema_destroy(&node.sem);
+        return BHT_ERROR;
+    }
+    bh_assert(thread_data != NULL);
+
+    mutex_lock(&thread_data->wait_list_lock);
+    if (!thread_data->thread_wait_list)
+        thread_data->thread_wait_list = &node;
+    else {
+        /* Add to end of waiting list */
+        os_thread_wait_node *p = thread_data->thread_wait_list;
+        while (p->next)
+            p = p->next;
+        p->next = &node;
+    }
+    mutex_unlock(&thread_data->wait_list_lock);
+
+    sema_wait(&node.sem);
+    // get the return value pointer conted may not be availible after return
+    if (value_ptr)
+        (*value_ptr) = node.ret;
+    /* Wait some time for the thread to be actually terminated */
+    //  TODO:   k_sleep(100);
+
+    // TODO: bump target prio to make it finish and free its resources
+    thread_yield();
+
+    // node has done its job
+    sema_destroy(&node.sem);
+
+    return BHT_OK;
+}
+
+// int vm_mutex_trylock(korp_mutex *mutex)
+// {
+//     return mutex_trylock(mutex);
+// }
+
+int
+os_mutex_init(korp_mutex *mutex)
+{
+    mutex_init(mutex);
+    return BHT_OK;
+}
+
+int
+os_mutex_destroy(korp_mutex *mutex)
+{
+    (void)mutex;
+    return BHT_OK;
+}
+
+int
+os_mutex_lock(korp_mutex *mutex)
+{
+    mutex_lock(mutex);
+    return 0; // Riot mutexes do not return until success
+}
+
+int
+os_mutex_unlock(korp_mutex *mutex)
+{
+    mutex_unlock(mutex);
+    return 0; // Riot mutexes do not return until success
+}
+
+int
+os_cond_init(korp_cond *cond)
+{
+    mutex_init(&cond->wait_list_lock);
+    cond->thread_wait_list = NULL;
+    return BHT_OK;
+}
+
+int
+os_cond_destroy(korp_cond *cond)
+{
+    (void)cond;
+    return BHT_OK;
+}
+
+static int
+os_cond_wait_internal(korp_cond *cond, korp_mutex *mutex, bool timed,
+                      uint64 useconds)
+{
+    os_thread_wait_node *node;
+
+    /* Create wait node and append it to wait list */
+    if (!(node = BH_MALLOC(sizeof(os_thread_wait_node))))
+        return BHT_ERROR;
+
+    sema_create(&node->sem, 0);
+    node->next = NULL;
+
+    mutex_lock(&cond->wait_list_lock);
+    if (!cond->thread_wait_list)
+        cond->thread_wait_list = node;
+    else {
+        /* Add to end of wait list */
+        os_thread_wait_node *p = cond->thread_wait_list;
+        while (p->next)
+            p = p->next;
+        p->next = node;
+    }
+    mutex_unlock(&cond->wait_list_lock);
+
+    /* Unlock mutex, wait sem and lock mutex again */
+    mutex_unlock(mutex);
+    if (timed)
+        sema_wait(&node->sem);
+    else
+        sema_wait_timed_ztimer(&node->sem, ZTIMER_USEC, useconds);
+    mutex_lock(mutex);
+
+    /* Remove wait node from wait list */
+    mutex_lock(&cond->wait_list_lock);
+    if (cond->thread_wait_list == node)
+        cond->thread_wait_list = node->next;
+    else {
+        /* Remove from the wait list */
+        os_thread_wait_node *p = cond->thread_wait_list;
+        while (p->next != node)
+            p = p->next;
+        p->next = node->next;
+    }
+    BH_FREE(node);
+    mutex_unlock(&cond->wait_list_lock);
+
+    return BHT_OK;
+}
+
+int
+os_cond_wait(korp_cond *cond, korp_mutex *mutex)
+{
+    return os_cond_wait_internal(cond, mutex, false, 0);
+}
+
+int
+os_cond_reltimedwait(korp_cond *cond, korp_mutex *mutex, uint64 useconds)
+{
+    return os_cond_wait_internal(cond, mutex, (useconds != BHT_WAIT_FOREVER),
+                                 useconds);
+}
+
+int
+os_cond_signal(korp_cond *cond)
+{
+    /* Signal the head wait node of wait list */
+    mutex_lock(&cond->wait_list_lock);
+    if (cond->thread_wait_list)
+        sema_post(&cond->thread_wait_list->sem);
+    mutex_unlock(&cond->wait_list_lock);
+
+    return BHT_OK;
+}
+
+uint8 *
+os_thread_get_stack_boundary()
+{
+#if defined(DEVELHELP) || defined(SCHED_TEST_STACK) \
+    || defined(MODULE_MPU_STACK_GUARD)
+    return (uint8 *)thread_get_active()->stack_start;
+#else
+    return NULL;
+#endif
+}