!19 Refactor wnd, add HelloWidgets

core/adapter/msg_win.cpp

@@ -0,0 +1,68 @@
+#include "../../core_include/api.h"
+#include "../../core_include/msg.h"
+#include <windows.h>
+
+c_fifo::c_fifo()
+{
+	m_head = m_tail = 0;
+	m_read_sem = CreateSemaphore(NULL,	// default security attributes
+								 0,		// initial count
+								 1,		// maximum count
+								 NULL);	// unnamed semaphore
+	m_write_mutex = CreateMutex(NULL, FALSE, NULL);
+}
+
+int c_fifo::read(void* buf, int len)
+{
+	unsigned char* pbuf = (unsigned char*)buf;
+	int i = 0;
+	while(i < len)
+	{
+		if (m_tail == m_head)
+		{//empty
+			WaitForSingleObject(m_read_sem, INFINITE);
+			continue;
+		}
+		*pbuf++ = m_buf[m_head];
+		m_head = (m_head + 1) % FIFO_BUFFER_LEN;
+		i++;
+	}
+	if(i != len)
+	{
+		ASSERT(FALSE);
+	}
+	return i;
+}
+
+int c_fifo::write(void* buf, int len)
+{
+	unsigned char* pbuf = (unsigned char*)buf;
+	int i = 0;
+	int tail = m_tail;
+
+	WaitForSingleObject(m_write_mutex, INFINITE);
+	while(i < len)
+	{
+		if ((m_tail + 1) % FIFO_BUFFER_LEN == m_head)
+		{//full, clear data has been written;
+			m_tail = tail;
+			log_out("Warning: fifo full\n");
+			ReleaseMutex(m_write_mutex);
+			return 0;
+		}
+		m_buf[m_tail] = *pbuf++;
+		m_tail = (m_tail + 1) % FIFO_BUFFER_LEN;
+		i++;
+	}
+	ReleaseMutex(m_write_mutex);
+
+	if(i != len)
+	{
+		ASSERT(FALSE);
+	}
+	else
+	{
+		ReleaseSemaphore(m_read_sem, 1, NULL);
+	}
+	return i;
+}