Mercurial > projects > ldc
annotate lphobos/gc/gclinux.d @ 535:f79bbd1d0b27
Add __APPLE__ to most #if linux compile time switches.
author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Sun, 24 Aug 2008 16:54:06 +0200 |
parents | 61615fa85940 |
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rev | line source |
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94
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1 |
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2 // Copyright (C) 2001-2004 by Digital Mars, www.digitalmars.com |
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3 // All Rights Reserved |
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4 // Written by Walter Bright |
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5 |
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6 import std.c.linux.linuxextern; |
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7 import std.c.linux.linux; |
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8 |
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9 /+ |
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10 extern (C) |
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11 { |
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12 // from <sys/mman.h> |
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13 void* mmap(void* addr, uint len, int prot, int flags, int fd, uint offset); |
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14 int munmap(void* addr, uint len); |
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15 const void* MAP_FAILED = cast(void*)-1; |
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16 |
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17 // from <bits/mman.h> |
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18 enum { PROT_NONE = 0, PROT_READ = 1, PROT_WRITE = 2, PROT_EXEC = 4 } |
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19 enum { MAP_SHARED = 1, MAP_PRIVATE = 2, MAP_TYPE = 0x0F, |
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20 MAP_FIXED = 0x10, MAP_FILE = 0, MAP_ANON = 0x20 } |
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21 } |
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22 +/ |
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23 |
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24 /*********************************** |
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25 * Map memory. |
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26 */ |
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27 |
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28 void *os_mem_map(uint nbytes) |
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29 { void *p; |
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30 |
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31 //errno = 0; |
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32 p = mmap(null, nbytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); |
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33 return (p == MAP_FAILED) ? null : p; |
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34 } |
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35 |
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36 /*********************************** |
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37 * Commit memory. |
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38 * Returns: |
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39 * 0 success |
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40 * !=0 failure |
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41 */ |
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42 |
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43 int os_mem_commit(void *base, uint offset, uint nbytes) |
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44 { |
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45 return 0; |
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46 } |
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47 |
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48 |
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49 /*********************************** |
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50 * Decommit memory. |
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51 * Returns: |
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52 * 0 success |
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53 * !=0 failure |
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54 */ |
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55 |
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56 int os_mem_decommit(void *base, uint offset, uint nbytes) |
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57 { |
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58 return 0; |
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59 } |
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60 |
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61 /*********************************** |
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62 * Unmap memory allocated with os_mem_map(). |
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63 * Returns: |
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64 * 0 success |
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65 * !=0 failure |
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66 */ |
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67 |
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68 int os_mem_unmap(void *base, uint nbytes) |
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69 { |
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70 return munmap(base, nbytes); |
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71 } |
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72 |
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73 |
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74 /********************************************** |
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75 * Determine "bottom" of stack (actually the top on x86 systems). |
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76 */ |
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77 |
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78 void *os_query_stackBottom() |
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79 { |
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80 version (none) |
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81 { // See discussion: http://autopackage.org/forums/viewtopic.php?t=22 |
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82 static void** libc_stack_end; |
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83 |
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84 if (libc_stack_end == libc_stack_end.init) |
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85 { |
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86 void* handle = dlopen(null, RTLD_NOW); |
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87 libc_stack_end = cast(void **)dlsym(handle, "__libc_stack_end"); |
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88 dlclose(handle); |
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89 } |
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90 return *libc_stack_end; |
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91 } |
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92 else |
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93 { // This doesn't resolve on all versions of Linux |
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94 return __libc_stack_end; |
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95 } |
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96 } |
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97 |
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98 |
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99 /********************************************** |
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100 * Determine base address and size of static data segment. |
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101 */ |
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102 |
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103 void os_query_staticdataseg(void **base, uint *nbytes) |
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104 { |
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105 *base = cast(void *)&__data_start; |
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106 *nbytes = cast(byte *)&_end - cast(byte *)&__data_start; |
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107 } |