Diff: mbed-dev/platform/CallChain.cpp

Revision:

10:41552d038a69

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev/platform/CallChain.cpp	Tue Jan 10 20:42:26 2017 +0000
@@ -0,0 +1,116 @@
+#include "platform/CallChain.h"
+#include "cmsis.h"
+#include "platform/critical.h"
+
+namespace mbed {
+
+class CallChainLink {
+public:
+    CallChainLink(): cb(), next(NULL) {
+        // No work to do
+    }
+
+    CallChainLink(Callback<void()> &callback): cb(callback), next(NULL) {
+        // No work to do
+    }
+    Callback<void()> cb;
+    CallChainLink * next;
+};
+
+CallChain::CallChain(int size) : _chain(NULL) {
+    // No work to do
+}
+
+CallChain::~CallChain() {
+    clear();
+}
+
+pFunctionPointer_t CallChain::add(Callback<void()> func) {
+    CallChainLink *new_link = new CallChainLink(func);
+    if (NULL == _chain) {
+        _chain = new_link;
+        return &new_link->cb;
+    }
+
+    CallChainLink *link = _chain;
+    while (true) {
+        if (NULL == link->next) {
+            link->next = new_link;
+            return &new_link->cb;
+        }
+        link = link->next;
+    }
+}
+
+pFunctionPointer_t CallChain::add_front(Callback<void()> func) {
+    CallChainLink *link = new CallChainLink(func);
+    link->next = _chain;
+    _chain = link;
+    return &link->cb;
+}
+
+int CallChain::size() const {
+    CallChainLink *link = _chain;
+    int elements = 0;
+    while (link != NULL) {
+        elements++;
+        link = link->next;
+    }
+    return elements;
+}
+
+pFunctionPointer_t CallChain::get(int idx) const {
+    CallChainLink *link = _chain;
+    for (int i = 0; i < idx; i++) {
+        if (NULL == link) {
+            break;
+        }
+        link = link->next;
+    }
+    return &link->cb;
+}
+
+int CallChain::find(pFunctionPointer_t f) const {
+    CallChainLink *link = _chain;
+    int i = 0;
+    while (link != NULL) {
+        if (f == &link->cb) {
+            return i;
+        }
+        i++;
+        link = link->next;
+    }
+    return -1;
+}
+
+void CallChain::clear() {
+    CallChainLink *link = _chain;
+    _chain = NULL;
+    while (link != NULL) {
+        CallChainLink *temp = link->next;
+        delete link;
+        link = temp;
+    }
+}
+
+bool CallChain::remove(pFunctionPointer_t f) {
+    CallChainLink *link = _chain;
+    while (link != NULL) {
+        if (f == &link->cb) {
+            delete link;
+            return true;
+        }
+        link = link->next;
+    }
+    return false;
+}
+
+void CallChain::call() {
+    CallChainLink *link = _chain;
+    while (link != NULL) {
+        link->cb.call();
+        link = link->next;
+    }
+}
+
+} // namespace mbed