Merged DMD 1.042.

dmd/root/async.c

@@ -0,0 +1,177 @@
+
+#define _MT 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#if _WIN32
+
+#include <windows.h>
+#include <stdio.h>
+#include <errno.h>
+#include <process.h>
+
+#include "root.h"
+#include "rmem.h"
+
+static unsigned __stdcall startthread(void *p);
+
+struct FileData
+{
+    File *file;
+    int result;
+    HANDLE event;
+};
+
+struct AsyncRead
+{
+    static AsyncRead *create(size_t nfiles);
+    void addFile(File *file);
+    void start();
+    int read(size_t i);
+    static void dispose(AsyncRead *);
+
+    HANDLE hThread;
+
+    size_t filesdim;
+    size_t filesmax;
+    FileData files[1];
+};
+
+
+AsyncRead *AsyncRead::create(size_t nfiles)
+{
+    AsyncRead *aw = (AsyncRead *)mem.calloc(1, sizeof(AsyncRead) +
+				(nfiles - 1) * sizeof(FileData));
+    aw->filesmax = nfiles;
+    return aw;
+}
+
+void AsyncRead::addFile(File *file)
+{
+    //printf("addFile(file = %p)\n", file);
+    //printf("filesdim = %d, filesmax = %d\n", filesdim, filesmax);
+    assert(filesdim < filesmax);
+    files[filesdim].file = file;
+    files[filesdim].event = CreateEvent(NULL, TRUE, FALSE, NULL);
+    ResetEvent(files[filesdim].event);
+    filesdim++;
+}
+
+void AsyncRead::start()
+{
+    unsigned threadaddr;
+    hThread = (HANDLE) _beginthreadex(NULL,
+	0,
+	&startthread,
+	this,
+	0,
+	(unsigned *)&threadaddr);
+
+    if (hThread)
+    {
+	SetThreadPriority(hThread, THREAD_PRIORITY_HIGHEST);
+    }
+    else
+    {
+	assert(0);
+    }
+}
+
+int AsyncRead::read(size_t i)
+{
+    FileData *f = &files[i];
+    WaitForSingleObject(f->event, INFINITE);
+    Sleep(0);			// give up time slice
+    return f->result;
+}
+
+void AsyncRead::dispose(AsyncRead *aw)
+{
+    delete aw;
+}
+
+
+
+unsigned __stdcall startthread(void *p)
+{
+    AsyncRead *aw = (AsyncRead *)p;
+
+    for (size_t i = 0; i < aw->filesdim; i++)
+    {	FileData *f = &aw->files[i];
+
+	f->result = f->file->read();
+	SetEvent(f->event);
+    }
+    _endthreadex(EXIT_SUCCESS);
+    return EXIT_SUCCESS;		// if skidding
+}
+
+#else
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "root.h"
+#include "rmem.h"
+
+struct FileData
+{
+    File *file;
+    int result;
+    //HANDLE event;
+};
+
+struct AsyncRead
+{
+    static AsyncRead *create(size_t nfiles);
+    void addFile(File *file);
+    void start();
+    int read(size_t i);
+    static void dispose(AsyncRead *);
+
+    //HANDLE hThread;
+
+    size_t filesdim;
+    size_t filesmax;
+    FileData files[1];
+};
+
+
+AsyncRead *AsyncRead::create(size_t nfiles)
+{
+    AsyncRead *aw = (AsyncRead *)mem.calloc(1, sizeof(AsyncRead) +
+				(nfiles - 1) * sizeof(FileData));
+    aw->filesmax = nfiles;
+    return aw;
+}
+
+void AsyncRead::addFile(File *file)
+{
+    //printf("addFile(file = %p)\n", file);
+    //printf("filesdim = %d, filesmax = %d\n", filesdim, filesmax);
+    assert(filesdim < filesmax);
+    files[filesdim].file = file;
+    //files[filesdim].event = CreateEvent(NULL, TRUE, FALSE, NULL);
+    //ResetEvent(files[filesdim].event);
+    filesdim++;
+}
+
+void AsyncRead::start()
+{
+}
+
+int AsyncRead::read(size_t i)
+{
+    FileData *f = &files[i];
+    f->result = f->file->read();
+    return f->result;
+}
+
+void AsyncRead::dispose(AsyncRead *aw)
+{
+    delete aw;
+}
+
+#endif