在kernel module中我可以调用 time 函数吗？ - Chinaunix

#include <curses.h>;#include <float.h>;#include <math.h>;#include <time.h>;/* To compile: gcc -o tclock tclock.c -lcurses -lm */#ifndef PI#define PI 3.141592654#endif#ifndef EXIT_SUCCESS#define EXIT_SUCCESS 0#endif#define sign(_x) (_x<0?-1:1)#define ASPECT 2.2#define ROUND(value) ((int)((value) + 0.5))#define A2X(angle,radius) ROUND(ASPECT * radius * sin(angle))#define A2Y(angle,radius) ROUND(radius * cos(angle))typedef struct { int row; int col;} Angel[13];static Angel range;static void plot(int x, int y, char col );static void dline(int from_x, int from_y, int x2, int y2, char ch);/* Plot a point */static void plot(int x, int y, char col){ mvaddch(y, x, (chtype) col);}/* Draw a diagonal(arbitrary) line using Bresenham's alogrithm. */static void dline(int from_x, int from_y, int x2, int y2, char ch){ int dx, dy; int ax, ay; int sx, sy; int x, y; int d; dx = x2 - from_x; dy = y2 - from_y; ax = abs(dx * 2); ay = abs(dy * 2); sx = sign(dx); sy = sign(dy); x = from_x; y = from_y; if (ax >; ay) { d = ay - (ax / 2); while (1) { plot(x, y, ch); if (x == x2) return; if (d >;= 0) { y += sy; d -= ax; } x += sx; d += ay; } } else { d = ax - (ay / 2); while (1) { plot(x, y, ch); if (y == y2) return; if (d >;= 0) { x += sx; d -= ay; } y += sy; d += ax; } }}int main(void){ int i, cx, cy; double mradius, hradius, mangle, hangle; double sangle, sradius, hours; int bg; int hdx, hdy; int mdx, mdy; int sdx, sdy; time_t tim; struct tm *t; char szChar[10]; int secFinger = 1, hourFinger = 2; chtype color; bool clicks = FALSE; int count = 0; initscr(); noecho(); if (has_colors()) { bg = COLOR_BLACK; start_color();#ifdef NCURSES_VERSION if (use_default_colors() == OK) bg = -1;#endif init_pair(secFinger, COLOR_CYAN, bg); init_pair(hourFinger, COLOR_GREEN, bg); } nl(); curs_set(0); timeout(0); cbreak(); cx = 39; cy = 12; mradius = 9; hradius = 6; sradius = 8; for (i = 0; i < 12; i++) { sangle = (i + 1) * (2.0 * PI) / 12.0; sradius = 10; sdx = A2X(sangle, sradius); sdy = A2Y(sangle, sradius); sprintf(szChar, "%d", i + 1); if ((i + 1) % 3 == 0) { chtype hc = COLOR_PAIR(hourFinger); hc |= A_BOLD; attrset(hc); mvaddstr((int) (cy - sdy), (int) (cx + sdx), szChar); attroff(hc); } else mvaddstr((int) (cy - sdy), (int) (cx + sdx), szChar); } sradius = 8; for (i = 0; i <= 12; ++i) { sangle = ((60 - i * 2) * (2.0 * PI) / 60.0); sdx = A2X(sangle, sradius); sdy = A2Y(sangle, sradius); range[i].col = cx + sdx; range[i].row = cy - sdy; } touchwin(stdscr); while (getch() == ERR) { refresh(); tim = time(NULL); t = localtime(&tim); hours = (t->;tm_hour + (t->;tm_min / 60.0)); if (hours >; 12.0) hours -= 12.0; mangle = ((t->;tm_min) * (2 * PI) / 60.0); mdx = A2X(mangle, mradius); mdy = A2Y(mangle, mradius); hangle = ((hours) * (2.0 * PI) / 12.0); hdx = A2X(hangle, hradius); hdy = A2Y(hangle, hradius); sangle = ((t->;tm_sec) * (2.0 * PI) / 60.0); sdx = A2X(sangle, sradius); sdy = A2Y(sangle, sradius); dline(cx, cy, cx + hdx, cy - hdy, '.'); dline(cx, cy, cx + mdx, cy - mdy, '*'); mvaddstr(5, 37, "OMEGA");//如果嫌OMEGA挡住指针，可放在上两行之上，反正我喜欢这样，呵呵 color = COLOR_PAIR(secFinger); color |= A_BOLD; attrset(color); plot(cx + sdx, cy - sdy, '+'); attroff(color); mvaddstr(23, 28, ctime(&tim)); //向右移动了点，显得好看些 refresh(); if (t->;tm_min == 59) if ((cx + sdx) == range[(int) hours].col && (cy - sdy) == range[(int) hours].row ) clicks = TRUE; if (clicks == TRUE) { if (count == 0) beep(); count =(++count) % 2; if ((cx + sdx) == range[0].col && (cy - sdy) == range[0].row) { clicks = FALSE; count = 0; } }//加入了下面的 if 语句，使之在 1:00:00 和 13:00:00报时if ((int) hours == 1 && t->;tm_min == 0 && t->;tm_sec == 0) beep(); napms(1000); plot(cx + sdx, cy - sdy, ' '); dline(cx, cy, cx + hdx, cy - hdy, ' '); dline(cx, cy, cx + mdx, cy - mdy, ' '); } curs_set(1); endwin(); return EXIT_SUCCESS;}

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