Besides adapting the components to the use of base/log.h, the patch cleans up a few base headers, i.e., it removes unused includes from root/component.h, specifically base/heap.h and ram_session/ram_session.h. Hence, components that relied on the implicit inclusion of those headers have to manually include those headers now. While adjusting the log messages, I repeatedly stumbled over the problem that printing char * arguments is ambiguous. It is unclear whether to print the argument as pointer or null-terminated string. To overcome this problem, the patch introduces a new type 'Cstring' that allows the caller to express that the argument should be handled as null-terminated string. As a nice side effect, with this type in place, the optional len argument of the 'String' class could be removed. Instead of supplying a pair of (char const *, size_t), the constructor accepts a 'Cstring'. This, in turn, clears the way let the 'String' constructor use the new output mechanism to assemble a string from multiple arguments (and thereby getting rid of snprintf within Genode in the near future). To enforce the explicit resolution of the char * ambiguity, the 'char *' overload of the 'print' function is marked as deleted. Issue #1987
74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
/*
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* \brief Implementation of Thread API interface for core
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* \author Stefan Kalkowski
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* \author Martin Stein
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* \date 2014-02-27
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*/
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/*
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* Copyright (C) 2014 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/thread.h>
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#include <base/sleep.h>
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#include <base/env.h>
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/* base-internal stack */
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#include <base/internal/stack.h>
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#include <base/internal/native_utcb.h>
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/* core includes */
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#include <map_local.h>
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#include <kernel/kernel.h>
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#include <platform.h>
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#include <platform_thread.h>
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using namespace Genode;
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namespace Genode { Rm_session *env_stack_area_rm_session(); }
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namespace Hw { extern Untyped_capability _main_thread_cap; }
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void Thread::start()
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{
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/* start thread with stack pointer at the top of stack */
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if (native_thread().platform_thread->start((void *)&_thread_start, stack_top()))
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error("failed to start thread");
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}
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void Thread::cancel_blocking()
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{
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native_thread().platform_thread->cancel_blocking();
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}
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void Thread::_deinit_platform_thread()
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{
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/* destruct platform thread */
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destroy(platform()->core_mem_alloc(), native_thread().platform_thread);
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}
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void Thread::_init_platform_thread(size_t, Type type)
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{
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if (type == NORMAL) {
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native_thread().platform_thread = new (platform()->core_mem_alloc())
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Platform_thread(_stack->name().string(), &_stack->utcb());
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return;
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}
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/* remap initial main-thread UTCB according to stack-area spec */
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Genode::map_local((addr_t)Kernel::Core_thread::singleton().utcb(),
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(addr_t)&_stack->utcb(),
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max(sizeof(Native_utcb) / get_page_size(), (size_t)1));
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/* adjust initial object state in case of a main thread */
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native_thread().cap = Hw::_main_thread_cap;
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}
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