1 files changed, 78 insertions, 0 deletions
diff --git a/stmhal/pybthread.h b/stmhal/pybthread.h
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+++ b/stmhal/pybthread.h
@@ -0,0 +1,78 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_STMHAL_PYBTHREAD_H
+#define MICROPY_INCLUDED_STMHAL_PYBTHREAD_H
+
+typedef struct _pyb_thread_t {
+    void *sp;
+    uint32_t local_state;
+    void *arg;                  // thread Python args, a GC root pointer
+    void *stack;                // pointer to the stack
+    size_t stack_len;           // number of words in the stack
+    uint32_t timeslice;
+    struct _pyb_thread_t *all_next;
+    struct _pyb_thread_t *run_prev;
+    struct _pyb_thread_t *run_next;
+    struct _pyb_thread_t *queue_next;
+} pyb_thread_t;
+
+typedef pyb_thread_t *pyb_mutex_t;
+
+extern volatile int pyb_thread_enabled;
+extern pyb_thread_t *volatile pyb_thread_all;
+extern pyb_thread_t *volatile pyb_thread_cur;
+
+void pyb_thread_init(pyb_thread_t *th);
+void pyb_thread_deinit();
+uint32_t pyb_thread_new(pyb_thread_t *th, void *stack, size_t stack_len, void *entry, void *arg);
+void pyb_thread_dump(void);
+
+static inline uint32_t pyb_thread_get_id(void) {
+    return (uint32_t)pyb_thread_cur;
+}
+
+static inline void pyb_thread_set_local(void *value) {
+    pyb_thread_cur->local_state = (uint32_t)value;
+}
+
+static inline void *pyb_thread_get_local(void) {
+    return (void*)pyb_thread_cur->local_state;
+}
+
+static inline void pyb_thread_yield(void) {
+    if (pyb_thread_cur->run_next == pyb_thread_cur) {
+        __WFI();
+    } else {
+        SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
+    }
+}
+
+void pyb_mutex_init(pyb_mutex_t *m);
+int pyb_mutex_lock(pyb_mutex_t *m, int wait);
+void pyb_mutex_unlock(pyb_mutex_t *m);
+
+#endif // MICROPY_INCLUDED_STMHAL_PYBTHREAD_H