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diff -up wvstreams-4.6.1/include/wvtask.h.magic wvstreams-4.6.1/include/wvtask.h
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--- wvstreams-4.6.1/include/wvtask.h.magic 2008-07-14 21:11:35.000000000 +0200
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+++ wvstreams-4.6.1/include/wvtask.h 2012-06-03 17:24:47.909187849 +0200
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@@ -45,7 +45,8 @@ class WvTask
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typedef void TaskFunc(void *userdata);
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static int taskcount, numtasks, numrunning;
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- int magic_number, *stack_magic;
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+ int volatile magic_number;
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+ int *stack_magic;
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WvString name;
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int tid;
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@@ -84,7 +85,7 @@ class WvTaskMan
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static WvTaskMan *singleton;
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static int links;
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- static int magic_number;
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+ static int volatile magic_number;
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static WvTaskList all_tasks, free_tasks;
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static void get_stack(WvTask &task, size_t size);
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diff -up wvstreams-4.6.1/utils/wvtask.cc.magic wvstreams-4.6.1/utils/wvtask.cc
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--- wvstreams-4.6.1/utils/wvtask.cc.magic 2009-05-13 23:42:52.000000000 +0200
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+++ wvstreams-4.6.1/utils/wvtask.cc 2012-06-03 14:29:09.729656804 +0200
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@@ -58,7 +58,8 @@ char *alloca ();
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int WvTask::taskcount, WvTask::numtasks, WvTask::numrunning;
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WvTaskMan *WvTaskMan::singleton;
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-int WvTaskMan::links, WvTaskMan::magic_number;
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+int WvTaskMan::links;
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+int volatile WvTaskMan::magic_number;
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WvTaskList WvTaskMan::all_tasks, WvTaskMan::free_tasks;
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ucontext_t WvTaskMan::stackmaster_task, WvTaskMan::get_stack_return,
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WvTaskMan::toplevel;
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