142 lines
2.8 KiB
C++
142 lines
2.8 KiB
C++
/******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along
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with Sortix. If not, see <http://www.gnu.org/licenses/>.
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process.h
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Describes a process belonging to a subsystem.
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******************************************************************************/
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#ifndef SORTIX_PROCESS_H
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#define SORTIX_PROCESS_H
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#include "descriptors.h"
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#include "cpu.h"
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namespace Sortix
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{
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class Thread;
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class Process;
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struct ProcessSegment;
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const size_t DEFAULT_STACK_SIZE = 64*1024;
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const int SEG_NONE = 0;
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const int SEG_TEXT = 1;
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const int SEG_DATA = 2;
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const int SEG_STACK = 3;
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const int SEG_OTHER = 4;
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struct ProcessSegment
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{
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public:
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ProcessSegment() : prev(NULL), next(NULL) { }
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public:
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ProcessSegment* prev;
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ProcessSegment* next;
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addr_t position;
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size_t size;
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int type;
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public:
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bool Intersects(ProcessSegment* segments);
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ProcessSegment* Fork();
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};
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class Process
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{
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public:
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Process();
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~Process();
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public:
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static void Init();
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private:
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static pid_t AllocatePID();
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public:
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addr_t addrspace;
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int exitstatus;
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char* workingdir;
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pid_t pid;
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int* errno;
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public:
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Process* parent;
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Process* prevsibling;
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Process* nextsibling;
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Process* firstchild;
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Process* zombiechild;
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public:
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Thread* firstthread;
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public:
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DescriptorTable descriptors;
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ProcessSegment* segments;
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public:
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bool sigint;
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public:
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int Execute(const char* programname, const byte* program, size_t programsize, int argc, const char* const* argv, CPU::InterruptRegisters* regs);
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void ResetAddressSpace();
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void Exit(int status);
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public:
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bool IsSane() { return addrspace != 0; }
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public:
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Process* Fork();
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private:
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Thread* ForkThreads(Process* processclone);
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void ExecuteCPU(int argc, char** argv, addr_t stackpos, addr_t entry, CPU::InterruptRegisters* regs);
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public:
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void ResetForExecute();
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public:
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inline size_t DefaultStackSize() { return DEFAULT_STACK_SIZE; }
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private:
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addr_t mmapfrom;
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public:
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addr_t AllocVirtualAddr(size_t size);
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public:
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void OnChildProcessExit(Process* process);
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public:
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static Process* Get(pid_t pid);
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private:
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static bool Put(Process* process);
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static void Remove(Process* process);
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};
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Process* CurrentProcess();
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}
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#endif
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