diff options
Diffstat (limited to 'arch/um/os-Linux/irq.c')
| -rw-r--r-- | arch/um/os-Linux/irq.c | 99 |
1 files changed, 36 insertions, 63 deletions
diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c index e599be423da..b9afb74b79a 100644 --- a/arch/um/os-Linux/irq.c +++ b/arch/um/os-Linux/irq.c @@ -1,24 +1,21 @@ /* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include <stdlib.h> -#include <unistd.h> #include <errno.h> +#include <poll.h> #include <signal.h> #include <string.h> -#include <sys/poll.h> -#include <sys/types.h> -#include <sys/time.h> -#include "user_util.h" -#include "kern_util.h" -#include "user.h" -#include "process.h" -#include "sigio.h" -#include "irq_user.h" -#include "os.h" +#include <irq_user.h> +#include <os.h> +#include <um_malloc.h> +/* + * Locked by irq_lock in arch/um/kernel/irq.c. Changed by os_create_pollfd + * and os_free_irq_by_cb, which are called under irq_lock. + */ static struct pollfd *pollfds = NULL; static int pollfds_num = 0; static int pollfds_size = 0; @@ -29,21 +26,21 @@ int os_waiting_for_events(struct irq_fd *active_fds) int i, n, err; n = poll(pollfds, pollfds_num, 0); - if(n < 0){ + if (n < 0) { err = -errno; - if(errno != EINTR) - printk("sigio_handler: os_waiting_for_events:" + if (errno != EINTR) + printk(UM_KERN_ERR "os_waiting_for_events:" " poll returned %d, errno = %d\n", n, errno); return err; } - if(n == 0) + if (n == 0) return 0; irq_fd = active_fds; - for(i = 0; i < pollfds_num; i++){ - if(pollfds[i].revents != 0){ + for (i = 0; i < pollfds_num; i++) { + if (pollfds[i].revents != 0) { irq_fd->current_events = pollfds[i].revents; pollfds[i].fd = -1; } @@ -52,20 +49,15 @@ int os_waiting_for_events(struct irq_fd *active_fds) return n; } -int os_isatty(int fd) -{ - return(isatty(fd)); -} - int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds) { if (pollfds_num == pollfds_size) { if (size_tmpfds <= pollfds_size * sizeof(pollfds[0])) { /* return min size needed for new pollfds area */ - return((pollfds_size + 1) * sizeof(pollfds[0])); + return (pollfds_size + 1) * sizeof(pollfds[0]); } - if(pollfds != NULL){ + if (pollfds != NULL) { memcpy(tmp_pfd, pollfds, sizeof(pollfds[0]) * pollfds_size); /* remove old pollfds */ @@ -73,18 +65,15 @@ int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds) } pollfds = tmp_pfd; pollfds_size++; - } else { - /* remove not used tmp_pfd */ - if (tmp_pfd != NULL) - kfree(tmp_pfd); - } + } else + kfree(tmp_pfd); /* remove not used tmp_pfd */ - pollfds[pollfds_num] = ((struct pollfd) { .fd = fd, - .events = events, - .revents = 0 }); + pollfds[pollfds_num] = ((struct pollfd) { .fd = fd, + .events = events, + .revents = 0 }); pollfds_num++; - return(0); + return 0; } void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, @@ -94,30 +83,31 @@ void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, int i = 0; prev = &active_fds; - while(*prev != NULL){ - if((*test)(*prev, arg)){ + while (*prev != NULL) { + if ((*test)(*prev, arg)) { struct irq_fd *old_fd = *prev; - if((pollfds[i].fd != -1) && - (pollfds[i].fd != (*prev)->fd)){ - printk("os_free_irq_by_cb - mismatch between " - "active_fds and pollfds, fd %d vs %d\n", + if ((pollfds[i].fd != -1) && + (pollfds[i].fd != (*prev)->fd)) { + printk(UM_KERN_ERR "os_free_irq_by_cb - " + "mismatch between active_fds and " + "pollfds, fd %d vs %d\n", (*prev)->fd, pollfds[i].fd); goto out; } pollfds_num--; - /* This moves the *whole* array after pollfds[i] + /* + * This moves the *whole* array after pollfds[i] * (though it doesn't spot as such)! */ - memmove(&pollfds[i], &pollfds[i + 1], (pollfds_num - i) * sizeof(pollfds[0])); - if(*last_irq_ptr2 == &old_fd->next) + if (*last_irq_ptr2 == &old_fd->next) *last_irq_ptr2 = prev; *prev = (*prev)->next; - if(old_fd->type == IRQ_WRITE) + if (old_fd->type == IRQ_WRITE) ignore_sigio_fd(old_fd->fd); kfree(old_fd); continue; @@ -129,10 +119,9 @@ void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, return; } - int os_get_pollfd(int i) { - return(pollfds[i].fd); + return pollfds[i].fd; } void os_set_pollfd(int i, int fd) @@ -142,21 +131,5 @@ void os_set_pollfd(int i, int fd) void os_set_ioignore(void) { - set_handler(SIGIO, SIG_IGN, 0, -1); -} - -void init_irq_signals(int on_sigstack) -{ - __sighandler_t h; - int flags; - - flags = on_sigstack ? SA_ONSTACK : 0; - if(timer_irq_inited) h = (__sighandler_t) alarm_handler; - else h = boot_timer_handler; - - set_handler(SIGVTALRM, h, flags | SA_RESTART, - SIGUSR1, SIGIO, SIGWINCH, SIGALRM, -1); - set_handler(SIGIO, (__sighandler_t) sig_handler, flags | SA_RESTART, - SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1); - signal(SIGWINCH, SIG_IGN); + signal(SIGIO, SIG_IGN); } |