| /* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- |
| * Copyright (c) 2014, gperftools Contributors |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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| */ |
| |
| #ifndef GETENV_SAFE_H |
| #define GETENV_SAFE_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * This getenv function is safe to call before the C runtime is initialized. |
| * On Windows, it utilizes GetEnvironmentVariable() and on unix it uses |
| * /proc/self/environ instead calling getenv(). It's intended to be used in |
| * routines that run before main(), when the state required for getenv() may |
| * not be set up yet. In particular, errno isn't set up until relatively late |
| * (after the pthreads library has a chance to make it threadsafe), and |
| * getenv() doesn't work until then. |
| * On some platforms, this call will utilize the same, static buffer for |
| * repeated GetenvBeforeMain() calls. Callers should not expect pointers from |
| * this routine to be long lived. |
| * Note that on unix, /proc only has the environment at the time the |
| * application was started, so this routine ignores setenv() calls/etc. Also |
| * note it only reads the first 16K of the environment. |
| * |
| * NOTE: this is version of GetenvBeforeMain that's usable from |
| * C. Implementation is in sysinfo.cc |
| */ |
| const char* TCMallocGetenvSafe(const char* name); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
