8f55767619
By making m_in job local (i.e., each job has its own copy of m_in instead of refering to the global m_in) we don't have to store and restore m_in on every thread yield. This reduces overhead. Moreover, remove the assumption that m_in is preserved. Do_XXX functions have to copy the system call parameters as soon as possible and only pass those copies to other functions. Furthermore, this patch cleans up some code and uses better types in a lot of places.
55 lines
2 KiB
C
55 lines
2 KiB
C
#ifndef __VFS_GLO_H__
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#define __VFS_GLO_H__
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/* EXTERN should be extern except for the table file */
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#ifdef _TABLE
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#undef EXTERN
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#define EXTERN
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#endif
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/* File System global variables */
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EXTERN struct fproc *fp; /* pointer to caller's fproc struct */
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EXTERN int susp_count; /* number of procs suspended on pipe */
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EXTERN int nr_locks; /* number of locks currently in place */
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EXTERN int reviving; /* number of pipe processes to be revived */
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EXTERN int pending;
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EXTERN int sending;
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EXTERN dev_t ROOT_DEV; /* device number of the root device */
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EXTERN int ROOT_FS_E; /* kernel endpoint of the root FS proc */
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EXTERN u32_t system_hz; /* system clock frequency. */
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/* The parameters of the call are kept here. */
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EXTERN message m_in; /* the input message itself */
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EXTERN message m_out; /* the output message used for reply */
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# define who_p ((int) (fp - fproc))
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# define isokslot(p) (p >= 0 && \
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p < (int)(sizeof(fproc) / sizeof(struct fproc)))
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# define who_e (self != NULL && fp != NULL ? fp->fp_endpoint : \
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m_in.m_source)
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# define call_nr (m_in.m_type)
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# define job_m_in (self->w_job.j_m_in)
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# define job_call_nr (job_m_in.m_type)
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# define super_user (fp->fp_effuid == SU_UID ? 1 : 0)
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# define scratch(p) (scratchpad[((int) ((p) - fproc))])
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EXTERN struct worker_thread *self;
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EXTERN int force_sync; /* toggle forced synchronous communication */
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EXTERN int deadlock_resolving;
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EXTERN mutex_t exec_lock;
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EXTERN mutex_t bsf_lock;/* Global lock for access to block special files */
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EXTERN struct worker_thread workers[NR_WTHREADS];
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EXTERN struct worker_thread sys_worker;
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EXTERN struct worker_thread dl_worker;
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EXTERN thread_t invalid_thread_id;
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EXTERN char mount_label[LABEL_MAX]; /* label of file system to mount */
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/* The following variables are used for returning results to the caller. */
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EXTERN int err_code; /* temporary storage for error number */
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/* Data initialized elsewhere. */
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extern int(*call_vec[]) (void);
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extern int(*pfs_call_vec[]) (void);
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extern char mode_map[]; /* mapping from O_ACCMODE mask to R_BIT/W_BIT flags */
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#endif
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