Diff: mbed-os/rtos/ThisThread.cpp

Revision:

0:8fdf9a60065b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os/rtos/ThisThread.cpp	Wed Oct 10 00:33:53 2018 +0000
@@ -0,0 +1,141 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * 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.
+ */
+
+#define __STDC_LIMIT_MACROS
+#include "rtos/ThisThread.h"
+
+#include "mbed.h"
+#include "rtos/rtos_idle.h"
+#include "mbed_assert.h"
+
+namespace rtos {
+
+uint32_t ThisThread::flags_clear(uint32_t flags)
+{
+    flags = osThreadFlagsClear(flags);
+    MBED_ASSERT(!(flags & osFlagsError));
+    return flags;
+}
+
+uint32_t ThisThread::flags_get()
+{
+    return osThreadFlagsGet();
+}
+
+static uint32_t flags_wait_for(uint32_t flags, uint32_t millisec, bool clear, uint32_t options)
+{
+    if (!clear) {
+        options |= osFlagsNoClear;
+    }
+    flags = osThreadFlagsWait(flags, options, millisec);
+    if (flags & osFlagsError) {
+        MBED_ASSERT((flags == osFlagsErrorTimeout && millisec != osWaitForever) ||
+                    (flags == osFlagsErrorResource && millisec == 0));
+        flags = ThisThread::flags_get();
+    }
+
+    return flags;
+}
+
+static uint32_t flags_wait_until(uint32_t flags, uint64_t millisec, bool clear, uint32_t options)
+{
+    uint64_t now = Kernel::get_ms_count();
+
+    uint32_t delay;
+    if (now >= millisec) {
+        delay = 0;
+    } else if (millisec - now >= osWaitForever) {
+        // Documentation permits early return for big offsets
+        delay = osWaitForever - 1;
+    } else {
+        delay = millisec - now;
+    }
+    return flags_wait_for(flags, delay, clear, options);
+}
+
+uint32_t ThisThread::flags_wait_all(uint32_t flags, bool clear)
+{
+    return flags_wait_for(flags, osWaitForever, clear, osFlagsWaitAll);
+}
+
+uint32_t ThisThread::flags_wait_all_for(uint32_t flags, uint32_t millisec, bool clear)
+{
+    return flags_wait_for(flags, millisec, clear, osFlagsWaitAll);
+}
+
+uint32_t ThisThread::flags_wait_all_until(uint32_t flags, uint64_t millisec, bool clear)
+{
+    return flags_wait_until(flags, millisec, clear, osFlagsWaitAll);
+}
+
+uint32_t ThisThread::flags_wait_any(uint32_t flags, bool clear)
+{
+    return flags_wait_for(flags, osWaitForever, clear, osFlagsWaitAny);
+}
+
+uint32_t ThisThread::flags_wait_any_for(uint32_t flags, uint32_t millisec, bool clear)
+{
+    return flags_wait_for(flags, millisec, clear, osFlagsWaitAny);
+}
+
+uint32_t ThisThread::flags_wait_any_until(uint32_t flags, uint64_t millisec, bool clear)
+{
+    return flags_wait_until(flags, millisec, clear, osFlagsWaitAny);
+}
+
+void ThisThread::sleep_for(uint32_t millisec)
+{
+    osStatus_t status = osDelay(millisec);
+    MBED_ASSERT(status == osOK);
+}
+
+void ThisThread::sleep_until(uint64_t millisec)
+{
+    // CMSIS-RTOS 2.1.0 had 64-bit time and osDelayUntil, but that's been revoked.
+    // Limit ourselves to manual implementation assuming a >=32-bit osDelay.
+
+    // 64-bit time doesn't wrap (for half a billion years, at last)
+    // make the effort to loop for unlimited sleep, as it doesn't cost much
+    uint64_t now;
+
+    while ((now = Kernel::get_ms_count()) < millisec) {
+        if (millisec - now > UINT32_MAX) {
+            sleep_for(UINT32_MAX);
+            continue;
+        } else {
+            sleep_for(millisec - now);
+            break;
+        }
+    }
+}
+
+void ThisThread::yield()
+{
+    osThreadYield();
+}
+
+osThreadId_t ThisThread::get_id()
+{
+    return osThreadGetId();
+}
+
+}