/* Unix SMB/CIFS implementation. process model manager - main loop Copyright (C) Andrew Tridgell 1992-2003 Copyright (C) James J Myers 2003 <myersjj@samba.org> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "includes.h" /* setup the events for the chosen process model */ const struct model_ops *process_model_startup(const char *model) { const struct model_ops *ops; ops = process_model_byname(model); if (!ops) { DEBUG(0,("Unknown process model '%s'\n", model)); exit(-1); } ops->model_startup(); return ops; } /* the list of currently registered process models */ static struct { struct model_ops *ops; } *models = NULL; static int num_models; /* register a process model. The 'name' can be later used by other backends to find the operations structure for this backend. */ static NTSTATUS register_process_model(const void *_ops) { const struct model_ops *ops = _ops; if (process_model_byname(ops->name) != NULL) { /* its already registered! */ DEBUG(0,("PROCESS_MODEL '%s' already registered\n", ops->name)); return NT_STATUS_OBJECT_NAME_COLLISION; } models = Realloc(models, sizeof(models[0]) * (num_models+1)); if (!models) { smb_panic("out of memory in register_process_model"); } models[num_models].ops = smb_xmemdup(ops, sizeof(*ops)); models[num_models].ops->name = smb_xstrdup(ops->name); num_models++; DEBUG(3,("PROCESS_MODEL '%s' registered\n", ops->name)); return NT_STATUS_OK; } /* return the operations structure for a named backend of the specified type */ const struct model_ops *process_model_byname(const char *name) { int i; for (i=0;i<num_models;i++) { if (strcmp(models[i].ops->name, name) == 0) { return models[i].ops; } } return NULL; } /* return the PROCESS_MODEL module version, and the size of some critical types This can be used by process model modules to either detect compilation errors, or provide multiple implementations for different smbd compilation options in one module */ const struct process_model_critical_sizes *process_model_version(void) { static const struct process_model_critical_sizes critical_sizes = { PROCESS_MODEL_VERSION, sizeof(struct model_ops), sizeof(struct smbsrv_connection), sizeof(struct event_context), sizeof(struct fd_event) }; return &critical_sizes; } /* initialise the PROCESS_MODEL subsystem */ BOOL process_model_init(void) { NTSTATUS status; status = register_subsystem("process_model", register_process_model); if (!NT_STATUS_IS_OK(status)) { return False; } /* FIXME: Perhaps panic if a basic process model, such as simple, fails to initialise? */ static_init_process_model; DEBUG(3,("PROCESS subsystem version %d initialised\n", PROCESS_MODEL_VERSION)); return True; }