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      1 /* Copyright (C) 2008 The Android Open Source Project
      2 **
      3 ** This software is licensed under the terms of the GNU General Public
      4 ** License version 2, as published by the Free Software Foundation, and
      5 ** may be copied, distributed, and modified under those terms.
      6 **
      7 ** This program is distributed in the hope that it will be useful,
      8 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
      9 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     10 ** GNU General Public License for more details.
     11 */
     12 #include "android/utils/system.h"
     13 #include "android/utils/assert.h"
     14 #include <stdlib.h>
     15 #include <stdio.h>
     16 #ifdef _WIN32
     17 #  define WIN32_LEAN_AND_MEAN
     18 #  include <windows.h>  /* for Sleep */
     19 #else
     20 #  include <unistd.h>  /* for usleep */
     21 #endif
     22 
     23 void*
     24 android_alloc( size_t  size )
     25 {
     26     void*   block;
     27 
     28     if (size == 0)
     29         return NULL;
     30 
     31     block = malloc(size);
     32     if (block != NULL)
     33         return block;
     34 
     35     fprintf(stderr, "PANIC: not enough memory\n");
     36     exit(1);
     37     return NULL;
     38 }
     39 
     40 void*
     41 android_alloc0( size_t  size )
     42 {
     43     void*   block;
     44 
     45     if (size == 0)
     46         return NULL;
     47 
     48     block = calloc(1, size);
     49     if (block != NULL)
     50         return block;
     51 
     52     fprintf(stderr, "PANIC: not enough memory\n");
     53     exit(1);
     54     return NULL;
     55 }
     56 
     57 void*
     58 android_realloc( void*  block, size_t  size )
     59 {
     60     void*   block2;
     61 
     62     if (size == 0) {
     63         free(block);
     64         return NULL;
     65     }
     66     block2 = realloc(block, size);
     67     if (block2 != NULL)
     68         return block2;
     69 
     70     fprintf(stderr, "PANIC: not enough memory to reallocate %zu bytes\n", size);
     71     exit(1);
     72     return NULL;
     73 }
     74 
     75 void
     76 android_free( void*  block )
     77 {
     78     if (block)
     79         free(block);
     80 }
     81 
     82 void*
     83 _android_array_alloc( size_t  itemSize, size_t  count )
     84 {
     85 #if ACONFIG_USE_ASSERT
     86     size_t  maxSize;
     87 
     88     if (itemSize == 0)
     89         AASSERT_FAIL("item size is 0\n");
     90 
     91     maxSize = (~(size_t)0) / itemSize;
     92     if (count > maxSize)
     93         AASSERT_FAIL("allocation too large (%d > %d)\n", count, maxSize);
     94 #endif
     95     return android_alloc(itemSize * count);
     96 }
     97 
     98 void*
     99 _android_array_alloc0( size_t  itemSize, size_t  count )
    100 {
    101     void*  block = _android_array_alloc(itemSize, count);
    102     memset(block, 0, itemSize*count);
    103     return block;
    104 }
    105 
    106 void*
    107 _android_array_realloc( void* block, size_t  itemSize, size_t  count )
    108 {
    109 #if ACONFIG_USE_ASSERT
    110     size_t  maxSize;
    111 
    112     if (itemSize == 0)
    113         AASSERT_FAIL("item size is 0\n");
    114 
    115     maxSize = (~(size_t)0) / itemSize;
    116     if (count > maxSize)
    117         AASSERT_FAIL("reallocation of %d-bytes array too large (%d > %d)\n",
    118                      itemSize, count, maxSize);
    119 #endif
    120     return android_realloc(block, itemSize*count);
    121 }
    122 
    123 char*
    124 android_strdup( const char*  str )
    125 {
    126     int    len;
    127     char*  copy;
    128 
    129     if (str == NULL)
    130         return NULL;
    131 
    132     len  = strlen(str);
    133     copy = malloc(len+1);
    134     memcpy(copy, str, len);
    135     copy[len] = 0;
    136 
    137     return copy;
    138 }
    139 
    140 #ifdef _WIN32
    141 char*
    142 win32_strsep(char**  pline, const char*  delim)
    143 {
    144     char*  line = *pline;
    145     char*  p    = line;
    146 
    147     if (p == NULL)
    148         return NULL;
    149 
    150     for (;;) {
    151         int          c = *p++;
    152         const char*  q = delim;
    153 
    154         if (c == 0) {
    155             p = NULL;
    156             break;
    157         }
    158 
    159         while (*q) {
    160             if (*q == c) {
    161                 p[-1] = 0;
    162                 goto Exit;
    163             }
    164             q++;
    165         }
    166     }
    167 Exit:
    168     *pline = p;
    169     return line;
    170 }
    171 #endif
    172 
    173 
    174 void
    175 disable_sigalrm( signal_state_t  *state )
    176 {
    177 #ifdef _WIN32
    178     (void)state;
    179 #else
    180     sigset_t  set;
    181 
    182     sigemptyset(&set);
    183     sigaddset(&set, SIGALRM);
    184     pthread_sigmask (SIG_BLOCK, &set, &state->old);
    185 #endif
    186 }
    187 
    188 void
    189 restore_sigalrm( signal_state_t  *state )
    190 {
    191 #ifdef _WIN32
    192     (void)state;
    193 #else
    194     pthread_sigmask (SIG_SETMASK, &state->old, NULL);
    195 #endif
    196 }
    197 
    198 void
    199 sleep_ms( int  timeout_ms )
    200 {
    201 #ifdef _WIN32
    202     if (timeout_ms <= 0)
    203         return;
    204 
    205     Sleep( timeout_ms );
    206 #else
    207     if (timeout_ms <= 0)
    208         return;
    209 
    210     BEGIN_NOSIGALRM
    211     usleep( timeout_ms*1000 );
    212     END_NOSIGALRM
    213 #endif
    214 }
    215