Import of the watch repository from Pebble

src/libos/include/os/assert.h

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "util/attributes.h"
+#include "util/likely.h"
+
+#include <stdint.h>
+
+NORETURN os_assertion_failed(const char *filename, int line);
+NORETURN os_assertion_failed_lr(const char *filename, int line, uint32_t lr);
+
+#define OS_ASSERT(expr) \
+  do { \
+    if (UNLIKELY(!(expr))) { \
+      os_assertion_failed(__FILE_NAME__, __LINE__); \
+    } \
+  } while (0)
+
+#define OS_ASSERT_LR(expr, lr) \
+  do { \
+    if (UNLIKELY(!(expr))) { \
+      os_assertion_failed_lr(__FILE_NAME__, __LINE__, lr); \
+    } \
+  } while (0)

src/libos/include/os/malloc.h

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stddef.h>
+
+void *os_malloc(size_t size);
+void *os_malloc_check(size_t size);
+void os_free(void *ptr);

src/libos/include/os/mutex.h

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+
+#include "util/list.h"
+
+struct pebble_mutex_t;
+typedef struct pebble_mutex_t PebbleMutex;
+struct pebble_recursive_mutex_t;
+typedef struct pebble_recursive_mutex_t PebbleRecursiveMutex;
+
+#define INVALID_MUTEX_HANDLE 0
+
+//! @return INVALID_MUTEX_HANDLE if failed, success otherwise.
+PebbleMutex *mutex_create(void);
+
+void mutex_destroy(PebbleMutex *handle);
+
+void mutex_lock(PebbleMutex *handle);
+
+bool mutex_lock_with_timeout(PebbleMutex *handle, uint32_t timeout_ms);
+
+void mutex_lock_with_lr(PebbleMutex *handle, uint32_t myLR);
+
+void mutex_unlock(PebbleMutex *handle);
+
+PebbleRecursiveMutex * mutex_create_recursive(void);
+
+void mutex_lock_recursive(PebbleRecursiveMutex *handle);
+
+bool mutex_lock_recursive_with_timeout(PebbleRecursiveMutex *handle, uint32_t timeout_ms);
+
+bool mutex_lock_recursive_with_timeout_and_lr(PebbleRecursiveMutex *handle,
+                                              uint32_t timeout_ms,
+                                              uint32_t LR);
+
+//! Tests if a given mutex is owned by the current task. Useful for
+//! ensuring locks are held when they should be.
+bool mutex_is_owned_recursive(PebbleRecursiveMutex *handle);
+
+void mutex_unlock_recursive(PebbleRecursiveMutex *handle);
+
+//! @return true if the calling task owns the mutex
+void mutex_assert_held_by_curr_task(PebbleMutex *handle, bool is_held);
+
+//! @return true if the calling task owns the mutex
+void mutex_assert_recursive_held_by_curr_task(PebbleRecursiveMutex *handle, bool is_held);

src/libos/include/os/tick.h

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "portmacro.h"
+
+#include <stdint.h>
+
+TickType_t milliseconds_to_ticks(uint32_t milliseconds);
+
+uint32_t ticks_to_milliseconds(TickType_t ticks);