155 lines
3.6 KiB
C++
155 lines
3.6 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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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 with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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process.h
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A named collection of threads.
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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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#include <sortix/kernel/kthread.h>
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#include <sortix/fork.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 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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friend void Process__OnLastThreadExit(void*);
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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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char* workingdir;
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pid_t pid;
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private:
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// A process may only access its parent if parentlock is locked. A process
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// may only use its list of children if childlock is locked. A process may
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// not access its sibling processes.
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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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kthread_mutex_t childlock;
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kthread_mutex_t parentlock;
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kthread_cond_t zombiecond;
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size_t zombiewaiting;
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bool iszombie;
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bool nozombify;
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addr_t mmapfrom;
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int exitstatus;
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public:
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Thread* firstthread;
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kthread_mutex_t threadlock;
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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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int Execute(const char* programname, const uint8_t* program,
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size_t programsize, int argc, const char* const* argv,
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int envc, const char* const* envp,
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CPU::InterruptRegisters* regs);
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void ResetAddressSpace();
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void Exit(int status);
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pid_t Wait(pid_t pid, int* status, int options);
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bool DeliverSignal(int signum);
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void OnThreadDestruction(Thread* thread);
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int GetParentProcessId();
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void AddChildProcess(Process* child);
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void ScheduleDeath();
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void AbortConstruction();
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public:
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Process* Fork();
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private:
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void ExecuteCPU(int argc, char** argv, int envc, char** envp,
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addr_t stackpos, addr_t entry,
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CPU::InterruptRegisters* regs);
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void OnLastThreadExit();
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void LastPrayer();
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void NotifyChildExit(Process* child, bool zombify);
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void NotifyNewZombies();
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public:
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void ResetForExecute();
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addr_t AllocVirtualAddr(size_t size);
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public:
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static Process* Get(pid_t pid);
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static pid_t HackGetForegroundProcess();
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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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void InitializeThreadRegisters(CPU::InterruptRegisters* regs,
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const tforkregs_t* requested);
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Process* CurrentProcess();
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}
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#endif
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