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Issue 200127: Made gyp file for command buffer libraries.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/o3d/
Patch Set: '' Created 11 years, 3 months ago
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1 /* 1 /*
2 * Copyright 2009, Google Inc. 2 * Copyright 2009, Google Inc.
3 * All rights reserved. 3 * All rights reserved.
4 * 4 *
5 * Redistribution and use in source and binary forms, with or without 5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are 6 * modification, are permitted provided that the following conditions are
7 * met: 7 * met:
8 * 8 *
9 * * Redistributions of source code must retain the above copyright 9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer. 10 * notice, this list of conditions and the following disclaimer.
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155 // around, adding noops. Thus this function may change the value of put_. 155 // around, adding noops. Thus this function may change the value of put_.
156 // The function will return early if an error occurs, in which case the 156 // The function will return early if an error occurs, in which case the
157 // available space may not be available. 157 // available space may not be available.
158 void CommandBufferHelper::WaitForAvailableEntries(unsigned int count) { 158 void CommandBufferHelper::WaitForAvailableEntries(unsigned int count) {
159 CHECK(count < entry_count_); 159 CHECK(count < entry_count_);
160 if (put_ + count > entry_count_) { 160 if (put_ + count > entry_count_) {
161 // There's not enough room between the current put and the end of the 161 // There's not enough room between the current put and the end of the
162 // buffer, so we need to wrap. We will add noops all the way to the end, 162 // buffer, so we need to wrap. We will add noops all the way to the end,
163 // but we need to make sure get wraps first, actually that get is 1 or 163 // but we need to make sure get wraps first, actually that get is 1 or
164 // more (since put will wrap to 0 after we add the noops). 164 // more (since put will wrap to 0 after we add the noops).
165 DCHECK_LE(1, put_); 165 DCHECK_LE(1U, put_);
166 Flush(); 166 Flush();
167 while (get_ > put_ || get_ == 0) WaitForGetChange(); 167 while (get_ > put_ || get_ == 0) WaitForGetChange();
168 // Add the noops. By convention, a noop is a command 0 with no args. 168 // Add the noops. By convention, a noop is a command 0 with no args.
169 CommandHeader header; 169 CommandHeader header;
170 header.size = 1; 170 header.size = 1;
171 header.command = 0; 171 header.command = 0;
172 while (put_ < entry_count_) { 172 while (put_ < entry_count_) {
173 entries_[put_++].value_header = header; 173 entries_[put_++].value_header = header;
174 } 174 }
175 put_ = 0; 175 put_ = 0;
176 } 176 }
177 // If we have enough room, return immediatly. 177 // If we have enough room, return immediatly.
178 if (count <= AvailableEntries()) return; 178 if (count <= AvailableEntries()) return;
179 // Otherwise flush, and wait until we do have enough room. 179 // Otherwise flush, and wait until we do have enough room.
180 Flush(); 180 Flush();
181 while (AvailableEntries() < count) WaitForGetChange(); 181 while (AvailableEntries() < count) WaitForGetChange();
182 } 182 }
183 183
184 } // namespace command_buffer 184 } // namespace command_buffer
185 } // namespace o3d 185 } // namespace o3d
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